Which one of the following is an example of a positive ion and negative ion that is isoelectronic with F−?
S2− and Mg2+ or Na+
O2− and Ca2+ or K+
O2− and Mg2+ or Li+
O2− and Mg2+ or Na+
F− (10 electrons); O−2 (10e−); Mg2+ (10e−); Na+ (10e−)
Which one of the following is an example of positive ion and negative ion that is isoelectronic with F−?