1. Physical Scienc Uses of radioactive material

2. Nuclear Fusion The combining of small atomic nuclei to produce larger ones

3. Nuclear Fusion This is the reaction taking place on the sun We have duplicated it in hydrogen bombs

4. Nuclear Fusion This is the reaction taking place on the sun We have duplicated it in hydrogen bombs No earthly materials will contain it Produces huge amounts of energy Fusion of 1g of hydrogen = 20 tons of coal Temperature can reach up to 50,000,000  C

5. Nuclear Fusion This is the reaction taking place on the sun We have duplicated it in hydrogen bombs No earthly materials will contain it Produces huge amounts of energy Fusion of 1g of hydrogen = 20 tons of coal Temperature can reach up to 50,000,000  C 2/1 H is very plentiful and easy to obtain Helium is inert and biologically stable Much work is being done on this reaction

6. Isotopic Dating Many naturally occurring isotopes are radioactive. This means they decompose (decay) on their own The rate of decay is constant

7. Isotopic Dating Half Life – The time it takes for one half of a substance to decompose

8. Isotopic Dating Half Life – The time it takes for one half of a substance to decompose

9. Isotopic Dating ParentDaughterHalf Life Carbon-14Nitrogen-145730 years Uranium-235Lead-207704 million years Uranium-238Lead-2064,470 million years Potassium-40Argon-401,280 million years Thorium-232Lead-20814,010 million years Rubidium-87Strontium-8748,800 million years Iodine - 1318.07 days Iron - 5945 days tritium 312.3 years sodium - 2415 hours technetium - 996 hours

11. Nuclear Power in the US There are 109 nuclear power plants 22% of our power is nuclear

12. Type of Uranium 3-4% U 238, for reactors, 90% for bomb Not possible to get an explosion

13. Benefits of Nuclear Power Very Economical (Cheap) Environmentally Clean (no emissions)

14. Problems With Nuclear Power Production of Nuclear Waste Possible Melt Down and Leakage

16. Therapeutic Treat or cure a disease with Radiation

17. Diagnostic Used to obtain information about a patients health