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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+

Respuesta :

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.

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