Published by:
CGP EDU Academic Team
Published on: August 11, 2026
Correct order of first IP among following elements 
, 
is
A
B 
B
B 
Be 
C 
N 
O
Be C N O
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
; 
. IP increases along the period. But IP of 
. Further IP of 
because atoms with fully or partly filled orbitals are most stable and hence have high ionisation energy.
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