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Byju's Answer
Standard XII
Chemistry
Multi-Electron Configurations and Orbital Diagrams
Electronic co...
Question
Electronic configuration of copper is?
A
[
A
r
]
4
s
2
3
d
9
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B
[
A
r
]
4
s
1
3
d
10
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C
[
A
r
]
4
s
1
3
d
8
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D
[
A
r
]
4
s
2
3
d
7
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Solution
The correct option is
B
[
A
r
]
4
s
1
3
d
10
Electronic configuration of copper.
Atomic number of Cu =
29
1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
4
s
1
3
d
10
or
A
r
4
s
1
3
d
10
Electron from
4
s
shifts into
3
d
orbit for stabilization. Attains stabilization with half filled and full filled orbit.
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1
Similar questions
Q.
Why Cu has the ground state electronic configuration as
[
A
r
]
4
s
1
3
d
10
instead of having
[
A
r
]
4
s
2
3
d
9
?
Q.
24
C
r
−
[
A
r
]
3
d
5
4
s
1
29
C
u
−
[
A
r
]
3
d
10
4
s
1
Why chromium and copper exhibits such electronic configuration ?
Q.
Assertion :
The ground state electron configuration orbitals of elemental
C
u
is
[
A
r
]
4
s
1
3
d
10
Reason:
Completely half-filled and filled d orbital best show special electronic stabilization
Q.
I
. The electron configuration of copper is
[
A
r
]
4
s
1
3
d
10
.
I
I
. A subshell which is
100
% full or
50
% full is more stable than subshells which are partially filled with a number of electrons less than or greater than half the number of electrons which can be held by the subshell.
Q.
The electronic configuration of chromium in [Cr(NH
3
)
6
]
3+
is:
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