AmongMg, Mg^(2+) ,A1 and A1^(3+) which willhas the largestand the smallestsizerespectively ?

AmongMg, Mg^(2+) ,A1 and A1^(3+) which willhas the largestand the smal

1.	AmongMg, Mg^(2+) ,A1 and A1^(3+) which willhas the largestand the smallestsizerespectively ?
Answer» `Mg, A1^(3+)` `A1^(3+) ,Mg` `Mg^(2+) , A1` `A1,Mg^(2+)` SOLUTION :Alonga periodatomicradiidecrease .ThereforeMg hassmalleratomicradiusthant A1. Amongstisoelectronicions (i.e., `Mg^(2+) =12-2=10` electronicand `A1^(3+)=13- 3 =10 ` electrons ) , higherthe + Vechargesmallerthe ionicradiusThus `A1^(3+)` has smallerionicradiusthan `Mg^(2+)` Combining thetwo trendsMg hasthe largestadn `A1^(3+)` has thesmallestsize i.e.,OPTION(a) ISCORRECT.