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Byju's Answer
Standard XII
Chemistry
Trend in Ionisation Enthalpy
Which of the ...
Question
Which of the following has highest second ionization energy?
A
N
i
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B
V
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C
C
r
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D
M
n
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Solution
The correct option is
D
C
r
Electronic configuration of chromium is
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
5
4
s
1
We can remove the
1
s
t
e
−
from valency shell
4
S
1
is very easily. So, the
1
s
t
ionisation potential is very low.
⇒
But for removing
2
n
d
electron it requires more energy because
3
d
5
is half filled. So, it have high second ionisation potential.
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