1.

Give reason: Coodination number of Be is 4, but that of Mg is six

Answer»

Solution :Beryllium does not have d subsshell in `n=2` level. It has only 4 VALENCE orbital. HENCE it can have a coordination NUMBER 4.
Mg has d subshels in `n=3` level. Hence it has more valence orbtial. THEREFORE it can have a coordination number 6.


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