The five successive ionization enthalpies of an

Question:

The five successive ionization enthalpies of an element are $800,2427,3658,25024$ and 32824 $\mathrm{kJ} \mathrm{mol}^{-1}$. The number of valence electrons in the element is :

 

  1. 2

  2. 3

  3. 4

  4. 5


Correct Option: , 2

Solution:

Let suppose element $X \Rightarrow$

$\mathrm{X}^{+3}$ has stable inert gas configuration as there is high jump after $\mathrm{IE}_{3}$

So valence electrons are 3

 

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