Nuclear Physics and RadioactivityMedium

Question

A nucleus undergoes a series of decay according to the scheme
 A B C D E Atomic number and mass numbers of E are 69 and 172

Options

A.Atomic number of A is 72
B.Mass number of B is 176
C.Atomic number of D is 69
D.Atomic number of C is 69

Solution

Assuming β to be +1β0
69E172 69D172 71C176 72B176 74A180

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