Q916
When there are two electrons in the same orbital, they have:
A.
Same spin
B.
Opposite spin
AnswerC.
Same or opposite spin
D.
No spin
Answer: Option B
Solution
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.