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A radon 220Rn86 nucleus emits an alpha particle becomes a

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A radon 220Rn86 nucleus emits an alpha particle becomes a

A) 216Po84 

B) 220At85 

C) 220Rn86 

D) 220Fr87 

E) 224Ra88

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1 Answer

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Best answer

The correct option is: (A) 216Po84 

Explanation:

An alpha particle is 4He2 so reduce the atomic mass by 4 and the atomic number by 2.

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