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In which of the following sets do all species have the same number of electrons? A) F-,Ne, Mg2+ B) Ge, Se2-, Br- C) K+,Rb+, Cs+ D) Br, Br-, Br+
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In which of the following sets do all species have the same number of electrons?

A) F-,Ne, Mg2+
B) Ge, Se2-, Br-
C) K+,Rb+, Cs+
D) Br, Br-, Br+

User Hagen
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1 Answer

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A) F- would mean fluorine would have an extra which would be the original 9+1 giving you 10. Neon has 10 electrons and Mg2+ means it is missing two electrons. So the neutral magnesium has 12 then you subtract 2 which also gives you 10 electrons.
User EricGS
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