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Question 1 of 6
1 of 6
Match each key word or phrase to the correct definition.
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a proton or neutron in a nucleus
the central part of an atom that contains protons and neutrons
the total number of protons + neutrons within a particular nucleus
atoms of the same element with differing numbers of neutrons
the number of protons within a particular nucleus
nucleus
nucleon
atomic (proton) number
mass (nucleon) number
isotopes
Match up the ones you are confident that you know first.
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