Published by:
CGP EDU Academic Team
Published on: August 11, 2026
The first ionization potentials 
of Be and 
respectively are
Text Solution
Verified by ExpertsThe correct answer is:
D
Due to stable fully ‐ filled ‘s’ ‐ orbital arrangement of electrons in ‘Be’ atom, more energy is required to remove an electron from the valence shell than ‘B’atom. Therefore ‘Be’ has higher ionisation potential than ‘B’.
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