Question

Write about aufbau principle and electronic configuration of cr24 and cu29

Answer 1

ACCORDING TO AUFBAU'S PRINCIPLE


electrons start filling in orbitals from lower energy to higher energy orbitals.
like 1s<2s<2p<3s<3p<4s<3d so on
the energy can be calculated by formula n+l
I explain u concept now try to do it yourself.
Any doubt so comment

Answer 2

electrons start filling in orbitals from lower energy level to higher energy level..which is called Aufbau principle.

E.C of cr24 is [Ar] 3d5 4s1
cu29 is [Ar]3d10 4s1