Arrange these in the order of their increasing sizes Na+ , Cl , Mg2+ , Al3+ Eplain with valid reasons plz .. I am in desperate need of help in here

Asked by GeoffreyRichards | 10th Nov, 2010, 09:17: AM

Expert Answer:

Correct order is :Na+> Mg2+ > Al3+ > Cl
According to the common perception, the size of Na+,Mg2+, Al3+ should be same as their number of electrons are same but the factor which you need to consider that nuclear charge increases and shielding effect decrease as we go from left to right, if nuclear charge increased and shielding effect decrease than atomic size decreses.

Answered by  | 10th Nov, 2010, 05:30: PM

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