Terbium

Rarity: Rare

A topic known well beyond its field, found in many languages.

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Notion

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Science and technology

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What Wikipedia says

Terbium is a chemical element; it has symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable and ductile. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas.

Excerpt from the Wikipedia article “Terbium”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: W. Oelen, CC BY-SA 3.0, via Wikimedia Commons.