Question

1. In which block will copper be placed if the Aufbau
principle is not followed and the filling of electron
takes place in the following sequence, 1s, 2s, 2p, 35, 3p,
3d, 4s, 4p, 40, 4f...?
(A) S
(B) p
(C) d​

Answer 1

Answer:

(B) S block.

Explanation:

By this method,last election fills in s- orbital instead of d- orbital...

please mark as brainleast answer...