"The following electron configurations belong to which elements?

1s² 2s² 2p⁶ 3s¹
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁶
[Kr] 5s² 4d¹⁰
[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²
[Rn] 7s² 5f¹⁴