Question

Which of the following forms of hydrogen emits low energy $\beta$- particles?

• A. Proton $H^{+}$
• B. Deuterium ${}_1^2\text{H}$
• C. Protium ${}_1^1\text{H}$
• D. Tritium ${}_1^3\text{H}$

Answer 1

The correct option is D Tritium ${}_1^3\text{H}$

Tritium isotope of hydrogen is radioactive and emits low energy $\beta$- particles.
It is because of high n/p ratio of the tritium which makes the nucleus unstable.