Respuesta :
Answer: Pauli exclusion principle: only two electrons can occupy the same orbital and they must have opposite spin directions
Explanation:
Explanation:
First, the Pauli exclusion principle lets us know that no two electrons can have the exact same quantum numbers. This means that two electrons in a single orbital must have opposite spins. ... Finally, the Aufbau Principle states that electrons fill lower energy orbitals before moving to higher energy orbitals