Nuclear models
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14 Terms
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Isotopes
Isotopes of an atom have the dame atomic number bit different masses due to a different number of neutrons
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Beta+ decay occurs when...
A nucleus has too many protons
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Beta+ decay produces...
a neutron, a positron and a neutrino
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Beta- decay occurs when...
a nucleus of an atom has too many neutrons
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Beta- decay produces...
a proton and an electron and an antineutrino
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Alpha decay occurs when...
Alpha decay occurs for unstable nuclei that have an atomic number greater than 83.
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Alpha particle are similar to..
The nuclei of a helium atom (2 protons 2 neutrons)
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Gamma decay occurs when...
when a nucleus is left with excess energy after an alpha or beta decay.
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Gamma radiation is...
a form of electromagnetic radiation. They do not have charge or mass and travel at the speed of light.
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Mass number
Protons+ neutrons
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Half life formula
N0 is the original number of nuclei
n is the number of half-lives
N is the number of nuclei after n half-lives
n is the number of half-lives
N is the number of nuclei after n half-lives
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Nuclear fission
The splitting of an unstable nucleus, releases gamma radiation and three neutrons
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Number of half lives are given by
n= log(N0/N) x 1/log(2)
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reactants
products
Note 
Flashcards (53)