Ncert Exercises & Solutions

9.2 Write the names of isotopes of hydrogen. What is the mass ratio of these isotopes?

Hydrogen has three isotopes. They are:

1. Protium,

\frac{1}{1} H

2. Deuterium, $\frac{2}{1} H$ or D, and

3. Tritium, $\frac{3}{1} H$ or T

The mass ratio of protium, deuterium and tritium is 1:2:3.