1. Radioactive Decay

2. Types of Decay
Alpha Decay
Beta Decay
Gamma Decay

3. Alpha Decay An alpha particle has 2 protons and 2 neutrons
Positively charged
The release of an alpha particle decreases the atomic number by 2 and the mass number by 4
These particles can be blocked by things like paper or clothing

4. Beta Decay
This is when a neutron from within an atom gets changed into a negatively charged particle and a proton
Fast moving electron
Mass number stays same, but the atomic number increases by 1
Can be blocked by an aluminum sheet, but not by paper

5. Gamma Decay
These are higher energy rays that accompany alpha and beta rays
These are very similar to X-rays
No charge and does not cause a change in the mass number or atomic number
Most gamma rays are blocked by a cement block but not all
These are the most destructive type of rays to humans