Explain how scientists know that elephants and hyraxes are related. Be sure to include anatomical similarities as well as fossil evidence in your explanation

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.

B. nuclear reactions could first occur.

Hi + naoh -> h2o + nal