Question

Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

• A. Neutron (n)
• B. Beta $\left({\beta }^{–}\right)$
• C. Alpha $\left(\alpha \right)$
• D. Gamma $\left(\gamma \right)$

Answer 1

The correct option is B Beta $\left({\beta }^{–}\right)$

Hydrogen has three isotopes : protium, ${}_1^1\text{H}$ deuterium, ${}_1^2\text{H}orD$ and tritium ${}_1^3\text{H}orT$. Of these isotopes, only tritium is radioactive and emits low energy ${\beta }^{-}$ particles $(t_{1/2},12.33\text{years}).$