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A radioactive nucleus undergoes a series...

A radioactive nucleus undergoes a series of decay according to the scheme. `Aoverset(alpha)toA_(1)overset(beta)toA_(2)overset(alpha)toA_(3)overset(gamma)toA_(4)`. If the mass number and atomic number aer 180 and 72 respectively, the mass number (x) and atomic and atomic number (y) of `A_(4)` are

A

x= 172: y = 72

B

x = 174, y = 69

C

x = 176, y = 69

D

x = 172: y = 69

Text Solution

Verified by Experts

The correct Answer is:
D
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