1.

Amongthe followingthethird ionizationenergyis highestfor

Answer»

MAGNESIUM
Boron
Beryllium
Aluminium

Solution :both Mgand BEHAVE twovalenceelectrons thereforethirdionizationenergyof each ATOMIS thehighest.Sinceatomicsize of BEIS higher than THATOF Mg .Thusoptions ( c) iscorrect.


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