What is the electronic configuration of group 1 elements?

 The electronic configuration of group1 elements are :
1) Lithium : 1s² 2s¹
2) Sodium  : 1s² 2s² 2p⁶ 3s¹
3) Potassium : 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
4) Rubidium : 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 5s¹
5) Caesium
6) Francium