True or false? During a phase change (from solid to liquid, for example) the temperature of the material stays the same.

Idon’t know sorry i don’t know the answer i’m s sorry

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.