Answer:
Alpha particles, Beta particles and Gamma rays
Step-by-step explanation:
The emission of particles when a radioactive atom decays is called radioactivity.
An atom is radioactive as a result of unstable nucleus. This unstable nucleus of the atom disinintegrates and leads to emission of Alpha particles, Beta particles and gamma rays.
Alpha particles contain 2 protons and 2 neutrons. They are positively charged
Beta particles are negatively charged
Gamma rays are electromagnetic waves with short wavelength