JEE PHYSICS MCQ: NUCLEI

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Analyzing +4 | -1

A radioactive nucleus

_Z^AX

undergoes spontaneous decay in the sequence

_Z^AX{ \to _{Z - 1}}B{ \to _{Z - 3}}C{ \to _{Z - 2}}D,

where

Z

is the atomic number of element

X

. The possible decay particles in the sequence are

View answer and explanation

Correct option: A

{\beta ^ + },\alpha ,{\beta ^ - }

The correct answer is A (

{\beta ^ + },\alpha ,{\beta ^ - }

) because a positron decay decreases the atomic number by 1, an alpha decay decreases it by 2, and a beta-minus decay increases it by 1.

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