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Which of the following electronic config...

Which of the following electronic configuration is/are wrong?
1. `1s^2 2s^(2)2p_(x)^(2)2p_(y)^(1)` (for nitrogen)
2. `1s^(2)2s^(2)2p_(x)^(2)2p_(y)^(1)2p_(z)^(1)`(for oxygen)
3. `1s^2 2s^2 2p^6 3s^(2)3p^(6)3d^(5)4s^(1)` (for chromium)
4. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(6)4s^(2)` (for iron)

A

1 and 3

B

3 and 4

C

1 only

D

2 only

Text Solution

Verified by Experts

The correct Answer is:
C
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