Question

The nucleus ²⁰² ₈₄X emits an alpha particle and forms, the nucleus Y. What changes will take place in the mass number and the atomic number of nucleus Y if it emits gamma radiations?

Answer 1

1. The nucleus ${}_{84}{}^{202}X$ emits an alpha particle and forms the nucleus $\gamma$ when alpha radiations take place and the equation of the change will be,

${}_{84}{}^{202}X\to {}_{82}{}^{198}\gamma +{}_2{}^{4}He$

2. When the nucleus ${}_{84}{}^{202}X$ emits gamma radiations, there is no change in its atomic number and mass number.