Multiple choice

Electronic configuration in ground state of Cu is

  1. 1s2 2s2 2p6 3s2 3p6 4s2 3d9

  2. 1s2 2s2 2p6 3s2 3p6 4s2 3d8

  3. 1s2 2s2 2p6 3s2 3p6 4s1 3d9

  4. 1s2 2s2 2p6 3s2 3p6 4s1 3d10

  5. 1s2 2s2 2p6 3s2 3p6 4s2 3d10

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct option. Completely filled d orbitals are stable. 29Cu: 1s2 2s2 2p6 3s2 3p6 4s1 3d10