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A radioactive atom X emits a beta-partic...

A radioactive atom `X` emits a `beta-`particle to produce an atom `Y` which then emits an Particle to give an atom `Z`
(1) the atomic number of `X` is less than that of `Z`.
(2) the atomic number of `Y` is less than that of `Z`.
(3) the mass number of `X` is the same as that of `Y`.

A

`1,2,3` correct

B

`1.2` correct

C

`2,3` correct

D

`3` correct

Text Solution

Verified by Experts

The correct Answer is:
D
(d) It is probably easier to consider the last two statements before the first one since they both involve comparison between an atom and its daughter product Can you make your choice by considering `2` and `3` only ?
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