There are 15 kids in tim's class. if you wanted to use a graph to plot how tall each one of them is, which type of graph should you use?

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.