Which one is a set of isolectronic species ?

1.	Which one is a set of isolectronic species ?
Answer» `N_(2), CO_(2), CN^(-)` `N, H_(2)S, CO` `N_(2), CO, CN^(-)` `Ca, Mg, Cl` Solution :`N_(2) = 7 + 7 = 14e^(-), CO_(2) = 6 + 2 xx 8 = 22 e^(-)` `CN^(-) = 6 + 7 + 1 = 14 e^(-)`. Hence, (a) is not `N = 7E^(-), H_(2)S = 2 + 16 = 18e^(-)` `CO = 6 + 8 = 14 e^(-)`. Hence (B) is not `N_(2) = 14 e^(-), CO =6 + 8 = 14e^(-), CN^(-) = 6 + 7 + 1` `= 14e^(-)`. Hence , (c) is a SET isolectronic species

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