which-of-the-following-sequences-correctly-represents-the-order-in-which-orbital

Question

Which of the following sequences correctly represents the order in which orbitals are filled according to the Aufbau principle?

Accepted Answer

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p

Answer

1s, 2s, 2p, 3p, 3s, 4s, 3d

Answer

1s, 2s, 3s, 2p, 3p, 4s, 3d

Answer

1s, 2s, 2p, 3s, 3d, 4s, 4p