You are the commander of a space station and your chief of security tells
you that sensors have just detected an
explosion
How long will it be before you
hear the sound of the
explosion?

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.

Is there a picture or answer choices?

H tricky one let me think and get back to u

Answer the air near the ground cools to its dew point