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| 1. |
Explainwhycationsare smallerand anionsare largerin radiithan theirparentatoms ? |
| Answer» Solution :The Ionicradius ofcation isalwayssmaller than theparent ATOM because theloss of one ORMORE elecrons increasesthe effectivenuclear charge. As aresult the forceof ATTRACTION of nucleus for theelectronsincreases and hencethe ionicradiidecrease. Incontrast the ionicradiusof an anionis always large than it parentatombecausethe addition of one or more elecrons decreases the effectivenuclear charge . As aresult , the forceof attraction of the nucleus for the electrons decreases andhencethe ionic radii increase. | |