Sort the phrases about the mesosphere and the thermosphere into the correct categories. is directly above the stratosphere
Mesosphere
Thermosphere
acts as a barrier to meteoroids
is where satellites travel
is very cold
reaches out into space
is very hot

The answer is c) pyrite

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.