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Dinesh khalmaniya 1
option C Ionization energy is the amount of energy required to remove the outer shell electron of an atom. It's directly proportional to the effective nuclear charge of an atom. As the size of an atom increases the Zeff also increases means IE increase. Among given atoms Na,Mg,Al and Si the atomic size of Si is maximum therefore it has highest IE and Na has least but if we compare Mg and Al,Mg has higher IE than Al due more Zeff than Al. So, the correct order of ionization energy will be 496,737,577,786 Na,Mg,Al,Si