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Question

Which one of the following set of ions represents the collection of isoelectronic species?
[Atomic numbers: F = 9; Cl = 17; Na = 11; Mg = 12; Al = 13; K = 19; Ca = 20; Sc = 21]


Solution

The correct option is B
K+(191=18¯e);Ca+2(202=18¯e);Sc+3(213=18¯e);Cl(17+1=18¯e)

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