18113862
Description
Flashcards by Thea Friend, updated more than 1 year ago
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Created by Thea Friend
over 5 years ago
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| Question | Answer |
| How is alpha particles stopped? | -stopped by a sheet of paper |
| What is alpha particles made of? | -2 protons and 2 electrons -it is identical to a helium nucleus |
| Describe what happens? | -it occurs in heavy elements as they have too many protons to be stable -so by releasing alpha particles they become more stable |
| Describe what happens{beta} | -a neutron in the nucleus spontaneously decays, into a proton and an electron -the proton stays in the nucleus while the electron flies out |
| Describe what happens{gamma] | -if a nucleus still has enough energy it can get rid of extra energy by releasing a gamma ray -gamma rays may be emitted alongside alpha and beta particles |
| How is beta stopped? | -beta is stopped by perspex |
| How is gamma stopped? | -gamma is stopped by lead |
| What is the lightest and what is the heaviest? | -the heaviest is alpha and gamma is the lightest |
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