Question

what is the hunds rule? two electrons in the same orbital must have opposite spin. electrons will enter empty orbitals of the same energy level before pairing up in an orbital with an electron already present. electrons fill an empty orbital before moving to the next orbital. rewatch

Explanation:

Hund's rule states that electrons will occupy empty orbitals of the same energy level singly before starting to pair up in an orbital with an electron already present. This maximizes the total spin and results in a lower - energy state for the atom.

Answer:

Electrons will enter empty orbitals of the same energy level before pairing up in an orbital with an electron already present