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The first ionization energy

Question:

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

  1. $496,737,577,786$

  2. $786,737,577,496$

  3. $496,577,737,786$

  4. $496,577,786,737$


Correct Option: 1

Solution:

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