Question

match the definition to the electron rule.
aufbau principle
hunds rule
pauli exclusion principle
empty orbitals in a level are filled with one electron before they pair up
electron orbitals are filled from the lowest energy to the highest energy
only 2 electrons can be in each orbital and they have opposite spins
possible points: 10

Explanation:

• Aufbau Principle: This principle states that electron orbitals are filled from the lowest energy to the highest energy. It's about the order of filling orbitals based on their energy levels.
• Hund's Rule: It says that empty orbitals in a level are filled with one electron before they pair up. This maximizes the number of unpaired electrons and gives a lower - energy state for certain atoms.
• Pauli Exclusion Principle: Only 2 electrons can be in each orbital and they have opposite spins. This is a fundamental rule about the quantum - mechanical nature of electrons in an orbital.

Answer:

• Aufbau Principle: electron orbitals are filled from the lowest energy to the highest energy.
• Hund's Rule: empty orbitals in a level are filled with one electron before they pair up.
• Pauli Exclusion Principle: Only 2 electrons can be in each orbital and they have opposite spins.