Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The second ionisation energies of 
and 
are in the order_____
A
B
B 
C 
Be C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The second ionisation energy is the energy required to remove an electron from a 
cation in the gaseous state.
Second ionisation energy is also affected by size, effective nuclear charge, and electron ic configuration.
Li has highest 
than 
because the second electron remove from stable noble gas configuration has higher 
than 
due to the extra stability of the 
subshell in the 
ion. Therefore, the correct order I.E 
will be : 
.
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