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10 cards from this deck
Number of protons in nucleus
Same element, different neutrons & masses
Protons + neutrons
A−ZA - ZA−Z
1+1+1+
11836\frac{1}{1836}18361 (negligible)
Equal protons and electrons
Charged atom, unequal protons & electrons
Positive ion, fewer electrons than protons
Identical (same electron number)
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