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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Analyzing +4 | -1

The five successive ionisation energies of the element are

800,2427,3658,25024

and

32824 \mathrm{~kJ} \mathrm{~mol}^{-1}

respectively. The number of valence electrons is :

View answer and explanation

Correct option: A

Option A is correct. The large jump in ionization energy between the 3rd and 4th ionization energies indicates that the element has 3 valence electrons.

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