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Question
Q191) Which of the following configuration is correct for iron?
a) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
7
b) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
5
c) 1s
2
2s
2
2p
6
3s
2
3p
6
3d
5
d) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
6
SOLUTION
Fe = 26 = 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d6
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