What are the names of the angels mentioned in the Quran?

Could you explain the differences between the angels and the humanbeings?

Does soul have any levels? Can it improve and deteriorate?

Is it possible for people to see the angels? Did our Prophet Muhammad (pbuh) see Gabriel in his genuine appearance?

What is evil-commanding soul? Could you explain its features?

Do angels get any pay or reward in return for their work?

What is soul? Is soul the same as life? What's soul like?

How can we believe the existence of angels? Are there any proves?

It's reported that, in the realm of souls some of the souls prostrated Allah while some didn't. Is it true? Were souls subjected to a test  before coming into this world and some became rebellious while the others were obedient?

Do angels love people? If they do, is it because Allah (swt) commands them so or is it because of their own will and preference to love?