(Please help ASAP I will mark brainliest!! (: )Which of the following describes what happens when a cell uses energy to transport something across the cell membrane? 1.osmosis
2.diffusion
3.passive transport
4.active transport

A3.5 gap gps and your masters degree

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.