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Which set has the same number of electrons? A)Br,Br-,Br+ B)N,O,F C)Na+,Mg2+,Al3+ D)K+,Rb+,Cs+ The answer is C but Why is it C?

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  • Which set has the same number of electrons? A)Br,Br-,Br+ B)N,O,F C)Na+,Mg2+,Al3+ D)K+,Rb+,Cs+ The answer is C but Why is it C?


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