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Two electrons occupying the same orbital must have:
AOpposite charge
BOpposing energy
COpposite spin
DOpposing mass
Answer & Solution
Correct answer: C. Opposite spin
1. The exclusion principle can be stated a second way.
2. Only two electrons may exist in the same orbital and they must have opposite spin.
3. They share n, l and m but differ in the spin quantum number.
_Source: syllabus Chemistry, Ch 2 'Structure of Atom'_
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