Some atomic isotopes are unstable and emit radiation sp they become more stable. This process is called Radioactive Decay.
Isotopes - Elements with a different number of Neutrons.
There are 3 types:
Alpha - α
Beta - β
Gamma - γ
Description: Helium nucleus of 2 protons and 2 neutrons.
Electric charge: 2+
Relative atomic mass: 4
Penetration power: Goes through plastic and stops.
Ionising effect: Big/heavy…