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CGP EDU Academic Team
Published on: August 14, 2026
The first four ionization energy values of a metal are 191, 587, 872 and 5962 kcal/mol respectively. The number of valence electrons in the element is:
Text Solution
Verified by ExpertsThe correct answer is:
C
IE 4 is abnormally higher than IE 3 which indicates that it has become very difficult to remove 4 th electron (due to attainment of inert gas configuration). Hence number of valence electrons must be 3.
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