Answer:
The electronic configuration is
1s² < 2s² < 2p⁶ < 3s² < 3p⁶ < 4s¹ < 3d¹⁰
Explanation:
The energy of the main shell depends on principal quantum number and energy of subshell depends on the summation of principal and azimuthal quantum number.
Lower (n + l) value says lower energy of the subshell and higher (n + l) value represent higher energy of the subshell.
The given electronic configuration for copper with atomic number 29
The pictorial representation is as follows
