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B2 noun #31 가장 일반적인 12분 분량

uranium

상위 31

연습하기 예시 노트와 팁 uranium 30초 만에

설명 uranium in your Level:

Uranium is a special kind of metal found in the ground. It is very heavy and has a lot of energy inside it. People use it to make electricity in big power plants. It is not something you see every day like iron or gold. It is famous because it is 'radioactive,' which means it sends out invisible energy. You might hear about it in movies or on the news when people talk about big energy or powerful bombs. It is a very important word for science and the world's power. Even though it is natural, it must be handled very carefully by experts.

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Uranium is a chemical element that we find in rocks and soil. It is a silvery-white metal, but it is most famous for being radioactive. This means its atoms are not stable and they release energy over time. We use this energy in nuclear power stations to create electricity for cities. Because it is so powerful, governments have strict rules about who can have it and how it is moved. You will often hear the word uranium when people talk about 'nuclear energy' or 'atomic power.' It is an important part of how some countries get their electricity without burning coal.

무료 가입하고 전체 설명 읽기

Uranium is a heavy, radioactive metallic element with the atomic number 92. It occurs naturally in low concentrations in soil, rock, and water. In the modern world, uranium is primarily used as fuel for nuclear reactors because it can undergo a process called fission, where its nucleus splits and releases a massive amount of heat. This heat is then used to produce steam and generate electricity. Uranium is also a subject of international politics because it can be 'enriched' to create nuclear weapons. When you read about 'uranium enrichment,' it refers to increasing the concentration of a specific type of uranium to make it more powerful.

무료 가입하고 전체 설명 읽기

Uranium is a dense, radioactive actinide metal that serves as the primary fuel source for the nuclear power industry. Its significance lies in its ability to sustain a nuclear chain reaction through the fission of its U-235 isotope. While U-238 is the most abundant isotope found in nature, it is the rarer U-235 that is 'fissile.' Consequently, natural uranium must often undergo enrichment to increase the U-235 content for use in light-water reactors. Beyond energy, uranium has historical and geological importance, being used for dating ancient rocks and, unfortunately, as a core component in the development of nuclear weaponry during the 20th century. Its management involves complex environmental and security protocols.

Uranium is a high-density, radioactive element that occupies a critical niche in both geochemistry and global geopolitics. As the heaviest naturally occurring element, its decay series provides the primary source of heat within the Earth's interior, driving mantle convection and plate tectonics. In industrial applications, the distinction between low-enriched uranium (LEU) for civilian power and highly enriched uranium (HEU) for naval propulsion or ordnance is a cornerstone of international non-proliferation efforts. The extraction process, involving the leaching of ores to produce yellowcake, necessitates rigorous environmental oversight due to the chemical toxicity and radiological risks associated with uranium tailings and their long-term sequestration.

무료 가입하고 전체 설명 읽기

Uranium, an actinide with the atomic number 92, represents a fundamental paradox of human achievement: a source of nearly limitless carbon-neutral energy and a catalyst for existential global risk. Its unique nuclear properties, specifically the high cross-section for thermal neutron-induced fission in the U-235 isotope, allow for the sustained chain reactions that power modern nuclear fleets. The complexities of the uranium fuel cycle—from 'in-situ' recovery mining to the isotopic separation in centrifuges and the eventual vitrification of high-level waste—demand an interdisciplinary understanding of physics, chemistry, and international law. Furthermore, the use of depleted uranium in kinetic energy penetrators underscores the element's dual-use nature, remaining a contentious issue in international humanitarian law and environmental remediation.

무료 가입하고 전체 설명 읽기

연습하기 예시 노트와 팁

uranium 30초 만에

Uranium is a heavy, silvery-white radioactive metal found naturally in the Earth's crust, primarily used as fuel for nuclear power plants and atomic weapons.
It is defined by its atomic number 92 and its ability to undergo nuclear fission, a process that releases massive amounts of thermal energy.
The element exists in several isotopes, with Uranium-235 being the most important for sustaining the chain reactions required for electricity generation.
Beyond energy, uranium is vital for geological dating and has significant geopolitical implications due to its potential use in military defense technologies.

Uranium is a naturally occurring chemical element that holds a unique and powerful position in the periodic table. As a heavy, silvery-white metal, it is characterized by its radioactivity and its role as the primary fuel for nuclear energy. In everyday conversation, the word uranium is often synonymous with immense power, scientific advancement, and the complex ethical dilemmas surrounding nuclear technology. It is not a word you would use to describe a common household object, but rather one that appears in discussions about global energy policy, environmental science, and international security. When scientists talk about uranium, they are often referring to its isotopes, specifically Uranium-235 and Uranium-238, which behave differently under nuclear fission. The element is found in small amounts within rocks, soil, and water, but it must be mined and processed into a concentrated form known as yellowcake before it can be used in reactors.

Scientific Classification: Uranium is categorized as an actinide metal with the atomic number 92. It is the heaviest naturally occurring element in the universe, formed in the heart of supernovae billions of years ago.

The geologist explained that the rock sample contained trace amounts of uranium, indicating a potential site for mining operations.

The use of uranium is strictly regulated by international bodies like the International Atomic Energy Agency. This is because the same material that can provide carbon-free electricity to millions can also be enriched to create weapons of mass destruction. Therefore, the word carries a heavy weight in political discourse. You will hear it in news reports concerning the 'enrichment' of uranium, which refers to increasing the proportion of the U-235 isotope to make it suitable for nuclear fission. In a broader sense, uranium represents the human ability to harness the fundamental forces of nature, for better or for worse.

Energy Density: A single pellet of uranium, roughly the size of a pencil eraser, contains as much energy as a ton of coal or 149 gallons of oil, highlighting its efficiency as a fuel source.

Engineers are developing new ways to recycle spent uranium fuel rods to reduce nuclear waste.

Historically, uranium was used as a coloring agent in glass and ceramics, producing a distinct yellow-green glow under ultraviolet light, known as 'Vaseline glass'. However, after the discovery of its radioactive properties and its potential for nuclear fission in the late 1930s, its primary application shifted entirely to the energy and defense sectors. Today, the extraction of uranium involves complex chemical processes to separate the metal from its ore, a process that has significant environmental and health implications for mining communities.

Geopolitical Impact: Nations with large uranium reserves, such as Kazakhstan, Canada, and Australia, play a critical role in the global energy supply chain and international diplomacy.

The treaty aimed to limit the amount of enriched uranium a country could stockpile for non-peaceful purposes.

The discovery of uranium fission changed the course of human history during the twentieth century.

Many deep-sea sensors use uranium isotopes to date the age of ocean sediments.

Using the word 'uranium' correctly requires an understanding of its context as a chemical element and a source of energy. It is almost always used as a noun, often preceded by adjectives that specify its state or purpose. For example, you will frequently see terms like 'enriched uranium', 'depleted uranium', or 'natural uranium'. Each of these phrases describes a different physical state of the element with vastly different uses. Enriched uranium is used for power and weapons, while depleted uranium, which is much less radioactive but extremely dense, is used in armor-piercing ammunition and radiation shielding.

Technical Usage: In scientific writing, uranium is often paired with its atomic mass number, such as 'uranium-235' or 'uranium-238', to distinguish between its isotopes.

The nuclear reactor requires fuel rods containing at least three percent enriched uranium to maintain a steady chain reaction.

When writing about the environment or mining, 'uranium' is often associated with terms like 'ore', 'tailings', and 'leaching'. These words describe the process of extracting the element from the earth and the waste products left behind. In these contexts, the focus is often on the safety protocols and the long-term storage of radioactive materials. For instance, a sentence might discuss the 'sequestration of uranium tailings' to prevent groundwater contamination. This shows that the word is not just about energy, but also about the responsibility of managing hazardous substances.

Geopolitical Usage: In political science, 'uranium enrichment' is a key phrase used to discuss a nation's nuclear capabilities and its compliance with international law.

The international community monitored the transport of uranium across borders to ensure it was used only for civilian energy.

In more creative or metaphorical contexts, uranium can be used to symbolize something that is inherently dangerous yet potentially beneficial. A writer might describe a 'uranium-like tension' in a room, suggesting a volatile situation that could explode at any moment. While this is less common than its literal use, it demonstrates the word's strong association with power and instability. However, in 99% of cases, you will find 'uranium' used in its literal, physical sense within the fields of physics, chemistry, and global politics.

Environmental Context: Sentences often focus on the 'half-life' of uranium, which is the time it takes for half of the radioactive atoms to decay, a process that takes billions of years for U-238.

Because uranium decays so slowly, it is used by scientists to estimate the age of the Earth itself.

The military uses depleted uranium in tank armor because of its incredible density and strength.

Australia holds nearly one-third of the world's known uranium deposits, making it a major exporter.

You are most likely to encounter the word 'uranium' in serious, informative settings rather than in casual, everyday small talk. It is a staple of news broadcasts, particularly those covering international relations, energy crises, or environmental concerns. For example, when a news anchor discusses 'nuclear non-proliferation treaties', the word uranium is almost certainly going to be mentioned as a key material being monitored. Similarly, in documentaries about the history of the 20th century, especially those focusing on the Cold War or the Manhattan Project, uranium is a central 'character' in the narrative of the atomic age.

Academic Settings: In high school and university science classes, uranium is used to teach concepts of radioactivity, half-life, and the periodic table's actinide series.

During the lecture, the professor explained how uranium atoms split during fission to release heat.

In the business and economic world, uranium is discussed as a commodity. Financial news outlets like Bloomberg or the Wall Street Journal report on 'uranium prices' and the performance of 'uranium mining stocks'. Investors follow these reports because the demand for uranium is tied to the global shift toward green energy and the construction of new nuclear power plants. If a country like China or India announces a massive expansion of its nuclear fleet, the word uranium will trend in financial circles as analysts predict a surge in demand for the fuel.

Environmental Debates: In town hall meetings or activist circles, the word is often heard in the context of 'uranium mining' and its impact on indigenous lands and local ecosystems.

The documentary highlighted the struggle of local communities against the expansion of a uranium mine near their water source.

Finally, you will hear uranium in the context of medical and geological research. While uranium itself isn't used directly in medicine like some other isotopes, its decay products are used in various diagnostic tools. Geologists use the presence of uranium in rocks to perform 'uranium-lead dating', which allows them to determine the age of ancient geological formations. In these professional spheres, the word is used with technical precision, often accompanied by specific isotope numbers or chemical symbols.

Geopolitical Summits: World leaders often discuss 'uranium stockpiles' during security summits to prevent the illicit trafficking of nuclear materials.

The report confirmed that the country had significantly increased its production of low-enriched uranium.

The antique collector was thrilled to find a rare piece of uranium glass that glowed brightly under his UV flashlight.

Scientists are studying how certain bacteria can actually 'eat' and neutralize uranium in contaminated soil.

One of the most frequent mistakes people make when talking about uranium is confusing it with other radioactive elements, most notably plutonium. While both are used in nuclear reactors and weapons, they are distinct chemical elements with different properties. Uranium is naturally occurring and can be mined from the ground, whereas plutonium is primarily a byproduct of uranium fission in a reactor. Using the words interchangeably in a technical or academic setting can lead to significant misunderstandings about how nuclear energy works.

Confusion with Plutonium: Remember: Uranium is the 'raw material' found in nature, while plutonium is usually 'man-made' in reactors.

Incorrect: The miners were looking for plutonium in the mountains. Correct: The miners were looking for uranium ore.

Another common error is the misconception that uranium is always highly dangerous and 'glowing green'. In reality, natural uranium is only mildly radioactive and can be handled with basic safety precautions (though you wouldn't want to ingest it). The 'glowing green' image comes from pop culture and the way uranium glass reacts to UV light, but pure uranium metal looks like a standard silvery-grey metal. Misunderstanding the actual physical appearance and immediate danger level of uranium can lead to unnecessary fear or, conversely, a lack of proper caution when dealing with industrial materials.

Grammar: Countability: Uranium is an uncountable noun. Do not say 'three uraniums'. Instead, say 'three samples of uranium' or 'three isotopes of uranium'.

Incorrect: We need more uraniums for the experiment. Correct: We need more uranium for the experiment.

Spelling can also be a hurdle. Because of its Latin-based suffix '-ium', which is common for elements (like helium, lithium, and magnesium), people sometimes misspell it as 'uranum' or 'uranyum'. Always ensure the 'i' is present before the 'um'. Additionally, when discussing 'enriched uranium', people sometimes forget that enrichment is a process, not a type of uranium found in the ground. You cannot mine 'enriched uranium'; you mine 'uranium ore' and then enrich it in a laboratory or industrial facility.

Misunderstanding Enrichment: Enrichment refers to the concentration of the U-235 isotope. It is a technical process, not a natural state of the element.

The facility was designed to process raw uranium into fuel-grade material.

The power plant uses uranium to generate steam, which then turns the turbines.

Geologists must be careful not to inhale uranium dust while working in the mines.

When discussing uranium, it is helpful to know related terms that describe other radioactive elements or nuclear fuels. The most common alternative in a nuclear energy context is 'thorium'. Thorium is another naturally occurring radioactive element that is being researched as a potentially safer and more abundant alternative to uranium for nuclear power. While they are different elements, they are often compared in debates about the future of energy. If you are writing about the 'fuel' for a reactor, you might use the term 'fissile material', which is a broader category that includes uranium-235 and plutonium-239.

Uranium vs. Thorium: Uranium is currently the industry standard, while thorium is a 'next-generation' fuel that produces less long-lived waste.

Scientists are debating whether uranium or thorium is the better long-term solution for carbon-free energy.

In the context of mining and raw materials, you might use the term 'ore'. Uranium ore is the rock from which uranium is extracted. Another related term is 'yellowcake', which is the concentrated form of uranium oxide produced during the milling process. Using these specific terms instead of just 'uranium' can make your writing sound more professional and technically accurate. For example, instead of saying 'they found uranium', you could say 'they discovered a high-grade uranium ore deposit'.

Uranium vs. Plutonium: Uranium is the primary fuel, whereas plutonium is a byproduct that can also be used as fuel or in weapons.

The reactor's design allows it to use both uranium and recycled plutonium as fuel.

When discussing the dangers or properties of uranium, words like 'radioactive', 'unstable', and 'heavy metal' are essential. Uranium is a 'heavy metal' in the chemical sense, similar to lead or mercury, which means it has toxic properties beyond its radioactivity. In environmental discussions, you might hear about 'radionuclides', which are radioactive atoms. Understanding these synonyms and related terms allows you to navigate complex discussions about nuclear science and policy with greater ease and precision.

Broader Categories: Uranium belongs to the 'actinide' series on the periodic table, a group of fifteen metallic elements from atomic number 89 to 103.

As an actinide, uranium shares many chemical properties with other heavy, radioactive metals.

The transition from coal to uranium has significantly reduced the carbon footprint of the nation's power grid.

The geologist identified the sample as pitchblende, a common mineral form of uranium.

How Formal Is It?

재미있는 사실

Before it was known to be radioactive, uranium was used for over 2,000 years to create yellow and green glazes in glass and pottery. Some ancient Roman mosaics have been found to contain small amounts of uranium oxide for color.

발음 가이드

UK /jʊˈreɪ.ni.əm/

US /jʊˈreɪ.ni.əm/

The primary stress is on the second syllable: yu-RAY-ni-um.

라임이 맞는 단어

titanium germanium cranium geranium palladium stadium iridium millennium

자주 하는 실수

Pronouncing it as 'ur-AY-nee-um' (missing the 'y' sound at the start).
Stressing the first syllable: 'YU-ray-nee-um'.
Stressing the third syllable: 'yu-ray-NEE-um'.
Omitting the 'i': 'yu-RAY-num'.
Adding a 'y' at the end: 'yu-RAY-nee-yum'.

난이도

독해 4/5

Requires understanding of scientific and political contexts.

쓰기 4/5

Spelling and technical collocations can be tricky.

말하기 3/5

Pronunciation is the main challenge.

듣기 3/5

Usually clear in context, but can be confused with other elements.

다음에 무엇을 배울까

선수 학습

element metal energy power atom

다음에 배울 것

radioactivity fission isotope enrichment plutonium

고급

actinide nucleosynthesis geochronology non-proliferation thermonuclear

알아야 할 문법

Mass Nouns

We say 'much uranium' not 'many uraniums'.

Compound Adjectives

Using 'uranium-fueled' to describe a ship.

Passive Voice in Science

Uranium is enriched in centrifuges.

Scientific Notation

Using 'U-235' as a shorthand in technical writing.

Prepositional Phrases

The decay 'of' uranium 'into' lead.

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수준별 예문

Uranium is a metal from the ground.

Uranium est un métal provenant du sol.

Noun, uncountable.

We use uranium to make power.

Nous utilisons l'uranium pour produire de l'énergie.

Used as an object.

Uranium is very heavy.

L'uranium est très lourd.

Subject of the sentence.

Is uranium dangerous?

L'uranium est-il dangereux ?

Interrogative form.

The scientist found some uranium.

Le scientifique a trouvé de l'uranium.

Modified by 'some'.

Uranium is not like gold.

L'uranium n'est pas comme l'or.

Negative comparison.

They mine uranium in Australia.

Ils extraient de l'uranium en Australie.

Present simple tense.

Uranium helps make electricity.

L'uranium aide à produire de l'électricité.

Third person singular verb.

Uranium is a radioactive element found in nature.

L'uranium est un élément radioactif présent dans la nature.

Adjective 'radioactive' modifying 'element'.

Many countries buy uranium for their power plants.

De nombreux pays achètent de l'uranium pour leurs centrales électriques.

Plural noun 'countries' as subject.

You cannot see the energy coming from uranium.

On ne peut pas voir l'énergie provenant de l'uranium.

Modal verb 'cannot'.

Uranium glass glows under a special light.

Le verre à l'uranium brille sous une lumière spéciale.

Compound noun 'uranium glass'.

The price of uranium went up this year.

Le prix de l'uranium a augmenté cette année.

Past simple 'went up'.

Workers must wear suits when they touch uranium.

Les travailleurs doivent porter des combinaisons lorsqu'ils touchent de l'uranium.

Obligation with 'must'.

Uranium is used in nuclear medicine too.

L'uranium est également utilisé en médecine nucléaire.

Passive voice 'is used'.

There is a lot of uranium in the Earth's crust.

Il y a beaucoup d'uranium dans la croûte terrestre.

Existential 'There is'.

The enrichment of uranium is a complex process.

L'enrichissement de l'uranium est un processus complexe.

Gerund 'enrichment' followed by 'of uranium'.

Uranium-235 is the isotope used for nuclear fission.

L'uranium 235 est l'isotope utilisé pour la fission nucléaire.

Specific isotope notation.

If we stop using uranium, we might need more coal.

Si nous arrêtons d'utiliser l'uranium, nous pourrions avoir besoin de plus de charbon.

First conditional structure.

The geologist identified the rock as uranium ore.

Le géologue a identifié la roche comme étant du minerai d'uranium.

Noun phrase 'uranium ore'.

Nuclear waste often contains spent uranium fuel.

Les déchets nucléaires contiennent souvent du combustible à l'uranium usé.

Adjective 'spent' modifying 'uranium fuel'.

Uranium was discovered by a German chemist in 1789.

L'uranium a été découvert par un chimiste allemand en 1789.

Passive voice with agent 'by a German chemist'.

The government is debating the safety of uranium mining.

Le gouvernement débat de la sécurité de l'extraction de l'uranium.

Present continuous tense.

Uranium is denser than lead, which makes it very heavy.

L'uranium est plus dense que le plomb, ce qui le rend très lourd.

Comparative adjective 'denser than'.

The treaty restricts the stockpiling of weapons-grade uranium.

Le traité restreint le stockage d'uranium de qualité militaire.

Compound adjective 'weapons-grade'.

Depleted uranium is often used in armor-piercing projectiles.

L'uranium appauvri est souvent utilisé dans les projectiles perce-blindage.

Past participle 'depleted' as an adjective.

The half-life of uranium-238 is approximately 4.5 billion years.

La demi-vie de l'uranium 238 est d'environ 4,5 milliards d'années.

Technical term 'half-life'.

Uranium mining can have significant environmental consequences.

L'extraction de l'uranium peut avoir des conséquences environnementales importantes.

Modal 'can' expressing possibility.

The reactor core was loaded with fresh uranium pellets.

Le cœur du réacteur a été chargé de pastilles d'uranium neuves.

Passive voice 'was loaded'.

Detecting trace amounts of uranium in water requires sensitive equipment.

La détection de traces d'uranium dans l'eau nécessite un équipement sensible.

Gerund 'Detecting' as subject.

Kazakhstan is currently the world's leading producer of uranium.

Le Kazakhstan est actuellement le premier producteur mondial d'uranium.

Superlative 'leading producer'.

Uranium atoms are split during the process of nuclear fission.

Les atomes d'uranium sont divisés pendant le processus de fission nucléaire.

Prepositional phrase 'during the process'.

The geopolitical landscape is heavily influenced by uranium reserves.

Le paysage géopolitique est fortement influencé par les réserves d'uranium.

Adverb 'heavily' modifying 'influenced'.

Isotopic separation is essential for producing fuel-grade uranium.

La séparation isotopique est essentielle pour produire de l'uranium de qualité combustible.

Adjective 'essential' followed by 'for' + gerund.

The environmental impact of uranium tailings remains a contentious issue.

L'impact environnemental des résidus d'uranium reste une question litigieuse.

Noun phrase 'uranium tailings'.

Uranium's high density makes it ideal for radiation shielding.

La haute densité de l'uranium le rend idéal pour la protection contre les radiations.

Possessive 'Uranium's'.

The decay of uranium into lead allows for precise geological dating.

La désintégration de l'uranium en plomb permet une datation géologique précise.

Noun 'decay' followed by 'of' and 'into'.

Regulatory frameworks ensure the safe transport of uranium hexafluoride.

Les cadres réglementaires assurent le transport sûr de l'hexafluorure d'uranium.

Specific chemical compound name.

The discovery of uranium fission paved the way for the atomic age.

La découverte de la fission de l'uranium a ouvert la voie à l'ère atomique.

Idiomatic phrase 'paved the way'.

In-situ leaching is a common method for extracting uranium from the ground.

La lixiviation in situ est une méthode courante pour extraire l'uranium du sol.

Technical mining term 'In-situ leaching'.

The proliferation of highly enriched uranium poses a systemic risk to global security.

La prolifération de l'uranium hautement enrichi pose un risque systémique pour la sécurité mondiale.

Abstract noun 'proliferation' as subject.

Uranium's role in the Earth's thermal budget is fundamental to planetary dynamics.

Le rôle de l'uranium dans le bilan thermique de la Terre est fondamental pour la dynamique planétaire.

Technical term 'thermal budget'.

The vitrification of uranium waste is a prerequisite for long-term geological disposal.

La vitrification des déchets d'uranium est une condition préalable au stockage géologique à long terme.

Noun 'vitrification' meaning turning into glass.

The ethical implications of uranium extraction on indigenous lands are profound.

Les implications éthiques de l'extraction de l'uranium sur les terres autochtones sont profondes.

Complex noun phrase as subject.

Advanced breeder reactors can utilize the more abundant uranium-238 isotope.

Les réacteurs surgénérateurs avancés peuvent utiliser l'isotope uranium 238, plus abondant.

Technical term 'breeder reactors'.

The kinetic energy of depleted uranium penetrators is leveraged in modern ballistics.

L'énergie cinétique des pénétrateurs à l'uranium appauvri est exploitée dans la balistique moderne.

Passive voice 'is leveraged'.

Uranium's valence states dictate its mobility in various geochemical environments.

Les états de valence de l'uranium dictent sa mobilité dans divers environnements géochimiques.

Technical term 'valence states'.

The clandestine procurement of uranium remains a primary concern for intelligence agencies.

L'achat clandestin d'uranium reste une préoccupation majeure pour les agences de renseignement.

Adjective 'clandestine' modifying 'procurement'.

자주 쓰는 조합

enriched uranium

depleted uranium

uranium mining

uranium enrichment

uranium ore

uranium isotopes

uranium deposits

uranium fuel

uranium tailings

uranium glass

자주 쓰는 구문

weapons-grade uranium

— Uranium enriched to over 90% U-235, suitable for making bombs.

The inspectors were looking for signs of weapons-grade uranium.

low-enriched uranium

— Uranium with 3-5% U-235, used in most commercial power plants.

Most nuclear reactors run on low-enriched uranium.

uranium-lead dating

— A method of measuring the age of rocks based on radioactive decay.

Uranium-lead dating proved the rock was billions of years old.

uranium hexafluoride

— A chemical compound used in the uranium enrichment process.

Uranium hexafluoride is a gas used in centrifuges.

natural uranium

— Uranium as it is found in nature, mostly U-238.

Some reactors can use natural uranium without enrichment.

uranium oxide

— The chemical form of uranium often found in fuel pellets.

The fuel is made of compressed uranium oxide.

uranium concentration

— The amount of uranium present in a specific sample or area.

The uranium concentration in the water was dangerously high.

uranium market

— The global trade and pricing of uranium as a commodity.

The uranium market is very sensitive to political changes.

uranium exploration

— The search for new sources of uranium in the earth.

The company invested millions in uranium exploration.

uranium series

— The sequence of elements that uranium decays into over time.

Radium is part of the natural uranium series.

자주 혼동되는 단어

uranium vs Plutonium

Plutonium is man-made in reactors, while uranium is naturally mined.

uranium vs Uranus

Uranus is the planet; uranium is the element named after it.

uranium vs Radium

Radium is much more radioactive and was discovered later than uranium.

관용어 및 표현

"go nuclear"

— To become extremely angry or to use the most extreme methods available.

When he found out about the mistake, he went nuclear.

informal

"critical mass"

— The minimum amount of something needed to start a significant change or reaction.

The project has finally reached critical mass and is moving forward.

neutral

"half-life"

— The period of time during which something remains effective or relevant.

The half-life of a viral video is usually only a few days.

neutral

"meltdown"

— A complete failure or a loss of emotional control.

The stock market had a total meltdown on Monday.

informal

"atomic age"

— The period of history following the discovery of nuclear power.

We are still living in the shadow of the atomic age.

formal

"chain reaction"

— A series of events where each one causes the next.

The closing of the factory started a chain reaction of business failures.

neutral

"fallout"

— The unpleasant results or effects of an action or event.

The political fallout from the scandal lasted for years.

neutral

"glow in the dark"

— Used metaphorically to describe something highly radioactive or dangerous.

The site was so contaminated people joked you would glow in the dark.

informal

"nuclear option"

— The most extreme course of action possible in a disagreement.

The manager decided to use the nuclear option and fire the entire team.

neutral

"under the radar"

— Doing something without being noticed (often used in smuggling contexts).

They tried to move the uranium under the radar.

informal

혼동하기 쉬운

uranium vs Thorium

Both are nuclear fuels.

Uranium is currently used in almost all reactors; thorium is a potential future alternative that is not yet widely used.

While uranium is the standard, thorium might be safer.

uranium vs Yellowcake

It is a form of uranium.

Uranium is the element; yellowcake is a specific solid powder form of uranium oxide produced during mining.

The miners shipped the yellowcake to the factory.

uranium vs Isotope

Uranium is often discussed in terms of its isotopes.

Uranium is the element; an isotope is a specific version of that element with a different number of neutrons.

U-235 is a fissile isotope of uranium.

uranium vs Fission

It is the process uranium undergoes.

Uranium is the 'fuel'; fission is the 'action' of splitting the atoms.

Uranium fission releases heat.

uranium vs Radiation

Uranium is radioactive.

Uranium is the physical substance; radiation is the energy it emits.

The uranium emitted high levels of radiation.

문장 패턴

Uranium is [adjective].

Uranium is heavy.

We use uranium for [noun].

We use uranium for power.

Uranium is used to [verb].

Uranium is used to generate electricity.

The [noun] of uranium is [adjective].

The enrichment of uranium is difficult.

Uranium plays a role in [complex noun phrase].

Uranium plays a role in the Earth's thermal budget.

The [abstract noun] of uranium [verb] [consequence].

The proliferation of uranium poses a global threat.

Uranium can be found in [location].

Uranium can be found in the ground.

Because of its [property], uranium is [usage].

Because of its density, uranium is used in armor.

어휘 가족

명사

uranium

uranite

uraninite

uranoplasty

형용사

uranic

uranous

uraniferous

사용법

frequency

Common in scientific, political, and environmental domains; rare in daily social life.

자주 하는 실수

Using 'uraniums' as a plural. → Samples of uranium.
Uranium is an uncountable mass noun. You cannot count individual units of it without a measure.
Confusing uranium with plutonium. → Uranium is mined; plutonium is made.
Uranium is a natural element. Plutonium is usually created from uranium in a reactor.
Saying 'uranium is green'. → Uranium is a silvery metal.
The green color is only seen in uranium glass or pop culture, not the metal itself.
Misspelling as 'uranum'. → Uranium.
The suffix is '-ium', which is standard for many metallic elements.
Thinking all uranium is used for bombs. → Most uranium is used for electricity.
Only highly enriched uranium is used for weapons; low-enriched uranium is for power.

팁

Use 'Enriched' for Power

When talking about nuclear energy, always specify 'enriched uranium' to show you understand it's been processed. This adds technical depth to your writing.

The 'I' is Key

Remember the 'i' in uran-i-um. It's a common mistake to write 'uranum'. Think of the 'i' as standing for 'isotope'.

Geopolitical Weight

Use the word 'uranium' when discussing international security. It sounds more professional than saying 'nuclear stuff' or 'bomb materials'.

Mass Noun Rule

Treat uranium like 'water' or 'sand'. You don't have 'three uraniums', you have 'three tons of uranium'. This is a common error for learners.

Stress the 'RAY'

Make sure to emphasize the middle syllable. yu-RAY-nee-um. If you stress the first syllable, it might sound like the planet Uranus.

Isotope Distinction

In a science context, specify U-235 (fissile) vs U-238 (abundant). This distinction is the core of nuclear physics.

Mention 'Tailings'

When discussing the environment, use the word 'tailings' (waste) alongside uranium. It shows a sophisticated understanding of mining impacts.

Atomic Age Reference

Use uranium when writing about the 1940s and 50s. It was the defining material of that era's technological leap.

Toxicity vs Radioactivity

Remember that uranium is a heavy metal. In a health context, mention its chemical toxicity as well as its radiation.

Silver, not Green

In descriptive writing, describe uranium as 'silvery-white' or 'grey'. Avoid the 'glowing green' cliché unless you are writing sci-fi.

암기하기

기억법

Think of the phrase: 'U Ran I Um'. Imagine YOU RAN to a power plant to see the element I (me) found, which is UraniUM. The 'U' is the symbol, and the 'Ran' reminds you of its power.

시각적 연상

Imagine a heavy, silvery metal bar that is sitting inside a giant glowing green light bulb. The metal is the uranium, and the light represents the massive energy it produces.

Word Web

Nuclear Energy Radioactive Fission Isotope Mining Bomb Reactor

챌린지

Try to explain the difference between 'enriched uranium' and 'depleted uranium' to a friend using only three sentences. This will help you master the technical nuances of the word.

어원

The word 'uranium' was coined by the German chemist Martin Heinrich Klaproth in 1789. He named the element after the planet Uranus, which had been discovered by William Herschel only eight years earlier in 1781. Klaproth followed the tradition of naming elements after celestial bodies, similar to mercury and tellurium.

원래 의미: Named after the Greek god Ouranos (the Sky), via the planet Uranus.

Indo-European (Greek -> Latin -> Scientific Latin).

문화적 맥락

Be careful when discussing uranium in the context of war or environmental disasters, as it can be a very emotional topic for many people.

In the US and Australia, uranium is often at the center of debates regarding energy independence and land rights.

The Manhattan Project (the secret WWII project to build the first atomic bomb). Marie Curie's research on radioactivity (though she is more famous for radium). The 'Yellowcake' controversy leading up to the Iraq War.

실생활에서 연습하기

실제 사용 상황

Energy Production

nuclear reactor fuel
carbon-free energy
thermal energy release
power grid supply

Geopolitics

nuclear non-proliferation
uranium enrichment levels
international sanctions
strategic stockpiles

Geology

uranium-lead dating
mineral deposits
radioactive decay
earth's crust concentration

Environmental Science

uranium tailings
groundwater contamination
radiation safety
waste sequestration

Military

depleted uranium armor
weapons-grade material
kinetic penetrators
atomic weaponry

대화 시작하기

"Do you think nuclear power plants should use more uranium to help stop climate change?"

"Have you ever seen uranium glass that glows under a black light?"

"What do you know about the history of uranium and the atomic bomb?"

"Is uranium mining a big industry in your country?"

"Do you think it's possible to safely store uranium waste for thousands of years?"

일기 주제

Reflect on the duality of uranium: it can provide clean energy or create massive destruction. How should humanity balance this?

Imagine you are a scientist who has just discovered a new use for uranium. What would it be?

Write about the environmental impact of mining uranium. Is the energy it provides worth the cost to the land?

How has the word 'uranium' changed in meaning from its discovery in 1789 to today?

If you lived near a uranium mine, what questions would you ask the government about your safety?

자주 묻는 질문

10 질문

Yes, uranium is a naturally occurring element found in low concentrations in soil, rock, and water. It is more common than gold or silver and is about as abundant as tin. Most of the uranium in the world is found in the Earth's crust, and it is mined in countries like Kazakhstan, Canada, and Australia.

Uranium is used because it can undergo nuclear fission. When a neutron hits a uranium-235 atom, the atom splits into two smaller atoms and releases a large amount of energy in the form of heat. This heat is used to boil water, create steam, and turn turbines that generate electricity.

Natural uranium is only mildly radioactive and is generally not dangerous to touch for short periods. However, it is chemically toxic if inhaled or swallowed, similar to lead. The main danger comes from 'enriched' uranium or the waste products of nuclear fission, which are much more radioactive.

Enriched uranium is uranium that has undergone a process to increase the percentage of the isotope Uranium-235. Natural uranium contains only about 0.7% U-235, but nuclear reactors usually need 3-5%, and weapons need over 90%. Enrichment is done using specialized machines called centrifuges.

Depleted uranium is the byproduct of the enrichment process. It is what is left over after the U-235 has been removed. It consists almost entirely of U-238 and is much less radioactive than natural uranium. Because it is extremely dense, it is used in military armor and heavy weights for airplanes.

No, pure uranium metal does not glow. The idea that it glows green comes from 'uranium glass,' which contains uranium oxide and glows under ultraviolet (UV) light. In popular culture, radioactivity is often shown as a green glow, but this is not a property of the element itself.

Uranium stays radioactive for a very long time. Its 'half-life'—the time it takes for half of the atoms to decay—is about 700 million years for U-235 and 4.5 billion years for U-238. This is why nuclear waste must be stored safely for thousands of years.

The largest known reserves of uranium are in Australia, Kazakhstan, and Canada. Kazakhstan is currently the world's largest producer, providing about 40% of the world's supply. Other significant producers include Namibia, Uzbekistan, and Russia.

Yes, 'spent' uranium fuel from nuclear reactors can be reprocessed to extract unused uranium and plutonium, which can then be used to make new fuel. This process is used in countries like France and Japan to reduce waste and get more energy from the same amount of material.

Before its nuclear properties were discovered, uranium was primarily used as a pigment. It created beautiful yellow, orange, and green colors in ceramic glazes and glass. It was also used in early photography and to color some types of leather and silk.

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