Question

An isotone of ${}_{32}^{76}\text{Ge}$ is :

• A. ${}_{32}^{77}\text{Ge}$
• B. ${}_{33}^{77}\text{AS}$
• C. ${}_{34}^{77}\text{Se}$
• D. ${}_{34}^{79}\text{Se}$

Answer 1

The correct option is B ${}_{33}^{77}\text{AS}$

Two nuclides are isotopes if they have the very same neutron number $N$, but different proton number $Z$. For example, boron-12 and carbon-13 nuclei both contain $7$ neutrons, and so are isotopes.

So, given no of neutrons in ${}_{32}^{76}Ge$ are $44$.

So, only option B has same no of neutrons.