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plutonium (noun)

Plutonium is a dense, silvery-white radioactive metal that is used as a fuel in nuclear reactors and as a primary ingredient in nuclear weapons. It is a transuranic element with the chemical symbol Pu and atomic number 94.

💬 Example

"The treaty aims to reduce the global stockpile of weapons-grade plutonium."

💡 Memory Tip

Think of 'Pluto' the planet. It's far away and mysterious, just like this rare and powerful element. PLU-TO-NIUM.

🏛️ Origin

⚠️ Common Mistakes

Using 'plutonium' when you mean 'platinum'. → Platinum is for rings; plutonium is for reactors.

Saying 'a plutonium'. → A sample of plutonium.

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