The video revisits molecular orbital theory, contrasting it with valence bond theory. It explains the concept of molecular orbitals, wave functions, and electron behavior, emphasizing the importance of interference patterns in orbital overlap. The tutorial covers molecular orbital diagrams, showing how they predict electron arrangements and bond orders. It also discusses s-p mixing and its impact on molecular orbital energies, providing a comprehensive understanding of molecular orbitals.

What is a key difference between valence bond theory and molecular orbital theory?

• Molecular orbital theory does not involve orbitals.

• Valence bond theory considers electrons localized.

• Molecular orbital theory considers electrons localized.

• Valence bond theory considers electrons delocalized.

What results from constructive interference of atomic orbital wave functions?

• Destructive interference

• Bonding molecular orbital

• Antibonding molecular orbital

• Electron repulsion

Which principle dictates that orbitals are filled from lower to higher energy?

• Hund's rule

• Heisenberg uncertainty principle

• Pauli exclusion principle

• Aufbau principle

How many bonding electrons are there in diatomic oxygen according to the MO diagram?

• 12

• 10

• 8

• 6

What phenomenon causes the sigma 2p bonding orbital to dip below the pi 2p bonding orbitals in some molecules?

• Electron shielding

• s-p mixing

• Orbital hybridization

• Electron delocalization

In which molecules is s-p mixing negligible?

• O2 and F2

• Li2 and Be2

• N2 and O2

• B2 and C2

What happens to the sigma s and sigma s star orbitals during s-p mixing?

• They become degenerate.

• They remain unchanged.

• They increase in energy.

• They decrease in energy.