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Which is the rarest element?...

Which is the rarest element?

A

Astatine

B

Radon

C

Uranium

D

Lithium

Text Solution

Verified by Experts

The correct Answer is:
A
Astatine is the rarest element in the earth.s crust occurring only as the decay product of various heavier elements. All of astatine.s isotopes are short-lived. Most stable is astatine-210, with a half-life of 8.1 hours.
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