types of decay

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Last updated 7:52 PM on 4/8/26
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4 Terms

1
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alpha decay

decay of a helium nucleus

see atomic number decrease by 2 and mass number by 4

2
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beta minus

conversion of a neutron to a proton mass unaffected

atomic number increases by 1

emits electron

3
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beta positive decay

emission of a positron

conversion of a proton to a neutron

atomic mass stays the same while atomic number decreases by 1

4
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gamma decay

emission of gamma rays photons no change to atomic mass or number