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A radioactive element X disintegrates su...

A radioactive element X disintegrates successively
`Xoverset(beta^(-))toX_(1)overset(alpha)toX_(2)overset(beta_(-))toX_(3)overset(alpha)toX_(4)`
If atomic number and atomic mass number of X are respectively, 72 and 180, then what are the corresponding values for `X_(4)` ?

A

69176

B

69172

C

71176

D

70172

Text Solution

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The correct Answer is:
D
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