Question

The nuclei ${}_3{\text{Li}}^7$ and ${}_4{\text{Be}}^8$ can be described as

• A. Isotopes
• B. Isobars
• C. Isotones
• D. Isomers

Answer 1

The correct option is C Isotones

The nuclei having the same number of neutrons $(N=A-Z)$ are called isotones.

For ${}_3{\text{Li}}^7,N=(7-3)=4$
For ${}_4{\text{Be}}^8,N=(8-4)=4$

Hence, option $\left(C\right)$ is correct.