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The five successive energies of an eleme...

The five successive energies of an element are `800, 2427, 3658, 25024` and `32824 kJ mol^(-1)` respectively. The number of valence electron is

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The correct Answer is:
3
Since `IE_(4)` is very high as compared to `IE_(3)`, therefore there are three electrons in the valence shell.
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