# The number of neutrons and electrons,

Question:

The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :-

1. 1 and 1

2. 3 and 1

3. 2 and 1

4. 2 and 2

Correct Option: , 3

Solution:

Radioactive isotope of hydrogen is Tritium $\left({ }_{1}^{3} \mathrm{~T}\right)$

No. of neutrons $(\mathrm{A}-\mathrm{Z})=3-1=2$

No. of electrons $=1$