Published by:
CGP EDU Academic Team
Published on: August 22, 2026
The correct order of the first ionization energies of the following metals; 
in 
, respectively is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
The expected order is 
.
But the actual/experimental order turns out to be 
, because of the fully filled ssubshell of magnesium and the 
configuration of 
which makes it relatively easy for 
to lose its outermost electron.
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