Nuclear Chemistry I.Half-Life II.Fission vs. Fusion.

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Presentation transcript:

Nuclear Chemistry I.Half-Life II.Fission vs. Fusion

Half-Life Half-life is the time required for half of a radioactive substance to decay. 100 g sample has a half- life of 5 years. How much is left after 5 years? 50 g How much is left after 2 half-lives or after 10 years? 25 g How much is left after 1 half-life? 50 g

N-13 emits beta radiation with a half-life of 10 min. How long is three half lives? 30 min How many grams of the isotope will be left if there were 10 g of N-13? 1.25 g

Chapter 18-3 Nuclear Fission vs. Fusion

Explaining mass defect: E=mc 2 says that mass can be converted into energy when the nucleus is formed

Nuclear Fusion -When multiple nuclei smash into each other forming a larger nucleus. - How our sun produces energy and how hydrogen bombs work

Nuclear Fusion Equations Nuclear fusion involves the joining together of nuclei.

Nuclear Fission -A large nucleus is split into two or more smaller nuclei (process sped up by hitting it with a neutron) - Releases Alpha, Beta, Gamma Rays and a lot of energy - Used to power nuclear weapons (atomic bombs), nuclear subs, & nuclear power plants

Nuclear Fission Nuclear fission involves a nucleus breaking up into smaller nuclei.

Nuclear Fission

Chernobyl power plant

Nuclear Fission Fukushima

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