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Which is the rarest element on earth?

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Which is the rarest element on earth?
posted Jan 23, 2017 by anonymous

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1 Answer

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Astatine is the rarest natural element on Earth. It's so rare, there's just 30 grams TOTAL in Earth's crust. Named after the Greek word for unstable (astatos), Astatine is a naturally occurring semi-metal that results from the decay of uranium and thorium.

answer Jan 25, 2017 by Shivaranjini
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