1. An atom is radioactive when
it decays or changes to form another atom
Something is always produced from the old atom
it is by random or chaotic chance
the process is independent of temperature, chemical
composition & pressure.

2. The three main types are
Alpha - 
Beta - 
Gamma - 

3.  alpha

4.  alpha
Nucleus throws out a bundle of;
2 protons + 2 neutrons

5.  alpha
Nucleus throws out a bundle of;
2 protons + 2 neutrons

6.  alpha
Nucleus throws out a bundle of;
2 protons + 2 neutrons

7.  alpha
Nucleus throws out a bundle of
2 protons + 2 neutrons

8.  beta

9.  beta
Nucleus throws out a neutron.

10.  beta
This breaks down to a proton and an electron.

11.  beta The proton is sucked back into the nucleus.
This high speed electron is the  particle.

12.  beta

13.  beta

14.  gamma

15.  gamma Nucleus throws a bundle of pure energy.
This is a short wavelength, electromagnetic wave.