What do youunderstandisoelectronicspecies? Namethe speciesthat will be isoelectronicwitheach of thefollowingatoms ofions(i) F^(-)(ii) Ar(iii) Mg^(2+)(iv) Rb^(+)

What do youunderstandisoelectronicspecies? Namethe speciesthat will be

1.	What do youunderstandisoelectronicspecies? Namethe speciesthat will be isoelectronicwitheach of thefollowingatoms ofions(i) F^(-)(ii) Ar(iii) Mg^(2+)(iv) Rb^(+)
Answer» <P> Solution :Ionsof differentelements whichhave thesame numberof electrons butdifferentmagnitude ofthenuclear chargeare calledisoelectronic ions. (i) `F^(-) ` has 10 (9+1)electrons . Thereforethe speciesnitrideion `N^(3-) (7+3)` , oxide, `O^(2-) (8+2) ` neon,Ne (10+0) , sodium ion `Na^(+) (11-1)` , magnesiumion `Mg^(2+) (12-2)` aluminium ion `A1^(3+) (13-3) ` etc . eachone of which contains10 electronsare isoelectronic with it. (ii) Ar has 18electrons . Thereforethe speciesphosphideion , `P^(3-)(15+3)` sulphideion , `S^(2) (16 +2),` chlorineion `(C1^(-)(17+1)` potassiumion `K^(+) (19-1)`calcium ion `Ca^(2+) (20-2)` etc. eachone ofwhichcontains18 electrons areisoelectronswith it. (ii) `Mg^(2+)` has 10 (12-2) electrons thereforethe species`N^(3-) , O^(2) , F^(-) , Ne , Na^(+) , A1^(3+)` etc, each oneofwhichcontains10 electrons are isoelectronic withit. (iv) `RB^(+)` has 36 (37-1) elecrons. Thereforethe species bromideion `B^(-) (35+1)` KRYPTON, Kr (36 + 0) andstrontium `Sr^(2+) (38-2)` each oneof whichhas 36electrons, areisoelectronicwith it.