Electron Configuration Practice Problems

Name the elements whose electron configurations are:

  1. 1s2 2s2 2p6 3s2 3p6 4s2 3d3
  2. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9
  3. 1s2 2s2 2p6 3s2 3p6
Write electron configurations for these elements:
  1. Potassium
  2. Lanthanum
  3. Copper
  4. Bromine

Quantum Numbers