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Nuclear Chemistry Mr. Skirbst Physical Science Topic 21.

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Presentation on theme: "Nuclear Chemistry Mr. Skirbst Physical Science Topic 21."— Presentation transcript:

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

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

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