Question

Which of the following electronic configuration is / are wrong ?
[1].s^2,2s^2,2px^2,2py^1 (for nitrogen)
[2].1s^2,2s^2,2px^,2py^1,2pz^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 & 3 b)3 & 4 c) l only d) 2 only


please correct answer me​

Answer 1

Answer:

plz mark as brainliest plz...

Answer 2

Answer:

the answer is only no.2 ok

plz mark me on brainlist ok