Which one of the following is not an iso-elec | vedclass

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(C) Iso-electronic species are those that have the same number of electrons.For $Mg^{2+}$ $(Z=12)$: $12 - 2 = 10$ electrons. For $C^{4-}$ $(Z=6)$: $6

Vedclass · Accepted Answer

$N^{2-}, O^{2-}$

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(C) Iso-electronic species are those that have the same number of electrons.For $Mg^{2+}$ $(Z=12)$: $12 - 2 = 10$ electrons. For $C^{4-}$ $(Z=6)$: $6 + 4 = 10$ electrons. Thus,$Mg^{2+}, C^{4-}$ is an iso-electronic pair.For $N^{3-}$ $(Z=7)$: $7 + 3 = 10$ electrons. For $O^{2-}$ $(Z=8)$: $8 + 2 = 10$ electrons. Thus,$N^{3-}, O^{2-}$ is an iso-electronic pair.For $N^{2-}$ $(Z=7)$: $7 + 2 = 9$ electrons. For $O^{2-}$ $(Z=8)$: $8 + 2 = 10$ electrons. These do not have the same number of electrons.For $F^{-}$ $(Z=9)$: $9 + 1 = 10$ electrons. For $Al^{3+}$ $(Z=13)$: $13 - 3 = 10$ electrons. Thus,$F^{-}, Al^{3+}$ is an iso-electronic pair.Therefore,the pair that is not iso-electronic is $N^{2-}, O^{2-}$.

Which one of the following is not an iso-electronic pair?

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