6. When there are two electrons in the same orbital, they have: A.Same spin B.Opposite spin C.Same or opposite spin D.No spin
Answer: Option B Solution: When there are two electrons in the same orbital, they have opposite spins. The Pauli exclusion principle states that there can only be a maximum of two electrons for every one orientation, and the two electrons must be opposite in spin direction; meaning one electron has ms=+21 and the other electron has ms=−21.
