1. Radioactivity Nuclear Fission and Fusion

2. Definition: breaking an unstable nucleus into two smaller nuclei Basic formula Element+ Neutron → + 3 neutronsSmaller Element + energySmaller Element + SAME Change SAME Change

3. Sample Equation:

5. Nuclear fission starts a chain reaction because of the extra neutrons that it emits. This is the type of reaction used to fuel nuclear power plants

6. Definition: two separate nuclei are fused together to make a larger nucleus. Basic Formula: Larger element → + energy Smaller Element +

7. Sample Equation: this is the nuclear reaction that is occurring on the sun and other stars to produce the solar energy that we use on the earth The massive amount of energy that is released in a hydrogen bomb is the result of the above fusion reaction.