Question

The first four ionization energy values of an element are 191, 578, 872 and 5962 kcal. the number of valence electrons in the elment is

Answer 1

The Valence electron in the element should be 3 because as from the given data it can be understood that removing the 4th electron requires greater amount of energy than all the previous IE's which depicts that after removing 3 electron the element have attained the stable configuration and it will require more energy to remove an electron in the stable configuration.

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Answer 2

Explanation:

your answer is attached above