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Question

Question: After \(1\alpha\)and \(2\beta\)emissions....

After 1α1\alphaand 2β2\betaemissions.

A

Mass number reduces by 3

B

Mass number reduces by 4

C

Mass number reduces by 6

D

Atomic number remains unchanged

Answer

Mass number reduces by 4

Explanation

Solution

ZXA→αZ−2YA−4→2βZXA−4ZX^{A}{\overset{\quad\alpha\quad}{\rightarrow}}_{Z - 2}Y^{A - 4}{\overset{\quad 2\beta\quad}{\rightarrow}}_{Z}X^{A - 4}