The sizesof followingspeciesincrease in theorder :

1.	The sizesof followingspeciesincrease in theorder :
Answer» `MG^(2+) LT Na^(+)lt F^(-)lt A1` `F^(-) lt A1 lt Na^(+) lt Mg^(2+)` `A1 lt Mg ^(2+)lt F^(-)lg Na^(+)` `Na^(+) , lt A1 lt F^(-)lt Mg^(2+)` SOLUTION :`Mg^(2+) , Na^(+) ` and `F^(-)` are isoelectronicions(havingtwo filledshells )thereforetheir size increae inthe order `:Mg^(2+), lt Na^(+)lt Na^(2+)lt F^(-)` Allbelongsto the 3rdperiodand alsodoes not carryany chargeThereforeit has the largestsize . Thustheoverallsizesincreasesin the order `: Mg^(2+)lt Na^(2+) lt F^(-)lt A1`

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