7.04 know that alpha (α) particles, beta (β−) particles, and gamma (γ) rays are ionising radiations emitted from unstable nuclei in a random process

There are three types of ionising radiation:

Alpha (α), Beta (β) and Gamma (γ)

One radioactive source can release different types of radiation.

Ionisation is when an atom loses or gains an electron, causing it to become an ion (an atom which is positively or negatively charged).