Question

A radioactive substance emits:

Options

• simultaneously α, β particles and γ radiations

• α-radiations or β-radiations

• in the order of α, β particles and γ radiations

• X-rays and γ-rays

Answer 1

α-radiations or β-radiations

Explanation:

In a single radioactive decay, either an α-particle or a β-particle is emitted, usually accompanied by γ-radiation. Both α and β particles are not emitted together in one decay. A radioactive substance does not emit X-rays as part of its radioactivity.