Problem: 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+

FREE Expert Solution

Isoelectronic means that two species have the same number of electrons.


In a neutral atom:              atomic number = # of protons = # of electrons


A) F-, Ne, Mg2+

• F- (fluorine)

• atomic number = 9
• number of electrons = 9 e-
• - charge → gained 1 electron
total electron = 10 e-

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Problem Details

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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