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Standard XII
Chemistry
Atomic Radii & Ionization Potential
The number of...
Question
The number of occupied sub-shells in Cr
3
+
ion is:
A
3
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B
4
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C
5
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D
6
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Solution
The correct option is
D
6
The sub-shell electronic configuration of
Cr
1s
2
, 2s
2
, 2p
6
, 3s
2
, 3p
6
, 3d
5
4s
1
Cr
3+
1s
2
, 2s
2
, 2p
6
, 3s
2
, 3p
6
, 3d
3
Therefore the number of sub-shells is 6( 1s,2s.2p,3s,3p,3d).
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