1. Nuclear Chemistry Mr. Skirbst Physical Science Topic 21

2. Nuclear Chemistry Radioactivity -

3. Nuclear Chemistry Radioactivity – - a release of matter and energy that changes the nucleus of an atom

4. 3 Types of Radiation 1. Alpha particles

5. 3 Types of Radiation 1. Alpha particles (+) 2 protons & 2 neutrons - can burn skin, but is stopped by paper

6. 3 Types of Radiation 2. Beta particles

7. 3 Types of Radiation 2. Beta particles (-) 1 electron & (+) 1 proton (from neutron decay) - can penetrate 3 mm of Al

8. 3 Types of Radiation 3. Gamma Rays

9. 3 Types of Radiation 3. Gamma Rays an electromagnetic wave (no charge) - penetrates several centimeters of Pb (lead)

10. 3 Types of Radiation TypeAt. MassCharge 4+ 0-0

11. Nuclear Stability Describes the “strength” of the nucleus

12. Nuclear Stability Binding Energy - nuclear force that holds the nucleus together

13. Nuclear Stability Radioactive Decay - unstable nucleus breaks down & releases energy & matter

14. Nuclear Stability 2 Types of Decay: Alpha decay -releases (2P & 2N) Beta decay - releases (1E & 1P from 1N)

15. Nuclear Stability Decay typeat. Massat. # -4-2 same+1

16. Nuclear Stability Half Life: - time it takes for ½ the atoms to decay

17. Nuclear Stability Nuclear Notation:

18. Nuclear Stability Decay Series: - Illustrates radioactive decay

19. Nuclear Energy Fission – splitting of atomic nucleus

20. Nuclear Energy Fusion – combining of atomic nucleus