Foundation
Chemistry
Ionisation Energy
Question

The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :

496, 577, 786, 737

786, 737, 577, 496

496, 577, 737, 786

496, 737, 577, 786

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Solution

Correct order of ionisation energy will be : Na < Al < Mg < Si