Question

A mixture of radioactive substances gives off three types of radiations. Name the radiation which has the highest ionizing power.

Answer 1

Radioactivity :-

1. Any radioactive nucleus emits like $\alpha ,\beta and\gamma$ particles from an unstable nucleus is called radioactivity.
2. In all three radiation, $\mathrm{\alpha }$- radiation has the highest ionizing power because $\mathrm{\alpha }$- radiation has the highest ionization energy.
3. $\mathrm{\alpha }$- radiation has double ionization of helium atoms so $\mathrm{\alpha }$-particles highest ionizing power.

Hence, $\mathrm{\alpha }$-radiation has the highest ionizing power.