1. Tardigrade
  2. Question
  3. Chemistry
  4. The first ionization enthalpy of Na , Mg and Si, respectively, are: 496, 737 and 786 kJ mol -1. The first ionization enthalpy ( kJ mol -1) of Al is:

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Q. The first ionization enthalpy of $Na , Mg$ and Si, respectively, are: $496, 737 $ and $786 \,kJ \,mol ^{-1}$. The first ionization enthalpy $\left( kJ \,mol ^{-1}\right)$ of $Al$ is:

JEE MainJEE Main 2022Classification of Elements and Periodicity in Properties

Solution:

I. E : $Na < Al < Mg < Si$
$\therefore 496< IE ( Al )<737$
Option (C), matches the condition.
i.e $\text{IE}( Al )=577\, kJ\,mol ^{-1}$