How do you write the electron configuration of scandium?

The electronic configuration of scandium is Sc: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹ .

So for scandium the 1^st and 2^nd electron must be in 1s orbital, the 3^rd and 4^th in the 2s, the 5^th through 10^th in the 2p orbitals, etc. In Scandium, the 4s has lower energy and appears before 3d