Which one of the following options does not represent ground state electronic configuration of an atom ?

Which one of the following options does not represent ground state ele

1.	Which one of the following options does not represent ground state electronic configuration of an atom ?
Answer» `1s^(2) 2s^(2) 2P^(2) 3S^(2) 2p^(6) 3d^(8) 4s^(2)` `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(9) 4s^(2)` `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(1)` `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5) 4s^(1)` Solution :Correct configuration (b) should be `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(1)` (for `._(29)Cu`)