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10 cards from this deck
Number of protons in nucleus
Total protons and neutrons in nucleus
Atoms with same protons, different neutrons
A−ZA - ZA−Z (mass number minus atomic number)
Equal to number of protons
Fewer electrons than protons
More electrons than protons
Same for all isotopes of an element
Different (e.g., mass, density)
Average mass of isotopes weighted by abundance
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