Molecular Orbital Energy Diagram

The video tutorial explains the formation of molecular orbitals through additive and subtractive combinations of atomic orbitals, resulting in bonding and antibonding orbitals. It covers Sigma and Pi orbitals, their symmetry, and electron density distribution. The energy levels of these orbitals are discussed, particularly for homonuclear diatomic molecules of the second row elements. The tutorial also explains how electron configurations determine molecular stability, bond order, and magnetic properties, using examples like dioxygen and liquid nitrogen.

What results from the additive combination of atomic orbitals?

• Antibonding molecular orbitals

• Non-bonding orbitals

• Bonding molecular orbitals

• Hybrid orbitals

Which type of molecular orbital is symmetrical around the bond axis?

• Phi molecular orbitals

• Sigma molecular orbitals

• Delta molecular orbitals

• Pi molecular orbitals

What is the energy level sequence for oxygen and fluorine compared to lithium?

• Different from lithium

• Lower than lithium

• Higher than lithium

• The same as lithium

What determines the stability of a molecule in terms of molecular orbitals?

• The number of antibonding orbitals

• The difference between bonding and antibonding electrons

• The total number of electrons

• The number of bonding orbitals

How is bond order related to bond length?

• Bond order increases as bond length increases

• Bond order decreases as bond length increases

• Bond order is unrelated to bond length

• Bond order is always equal to bond length

What is the magnetic nature of a substance with all doubly occupied molecular orbitals?

• Antiferromagnetic

• Paramagnetic

• Diamagnetic

• Ferromagnetic

Which molecule is an example of a paramagnetic substance?

• Gaseous hydrogen

• Solid carbon dioxide

• Liquid oxygen

• Liquid nitrogen