U MULTICULIFE THU
the diagram, and answer the question that follows.
M
Using the principles of original horizontality, superposition, and cross-cutting relationships, determine which of
the following features is the youngest.
O AG
OB. M
OC. O
ODP

Ithink is d. physical property

Answer) by studying proton collisions hope this : )

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.