Chemistry: Bonding and Antibonding Orbitals

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10 Questions

Which type of bond always exist with σ bonds?

π bonds

When are π bonds formed?

When atomic orbitals intersect in a sideways positive direction

In molecular orbital formation, what does the stability of the resulting molecule depend on?

The number of electrons occupying lower energy orbitals compared to higher energy orbitals

How many nodal planes do π*-orbitals have?


Which type of atomic orbitals generate σ2𝑃𝒛 molecular orbitals?

2𝑃z atomic orbitals

Which type of orbital takes part in the formation of chemical bond by in-phase combination of atomic orbitals?

Bonding Orbitals

In which type of molecular orbitals is the electron density higher and the energy lower?

Bonding Molecular Orbitals

What distinguishes the σ and π bonds from each other?

The head-to-head overlapping of orbitals forms σ bonds, whereas the lateral overlap forms π bonds.

Which type of combination of atomic orbitals may form a σ bond?

S-S and S-P orbitals

Which type of covalent bond is formed by the lateral overlap of orbitals?

π Bond

Study Notes

Bonding Types and Molecular Orbitals

  • π bonds always exist with σ bonds, as they are formed perpendicular to the σ bond.
  • π bonds are formed when parallel p-orbitals overlap sideways.
  • The stability of the resulting molecule in molecular orbital formation depends on the energy of the molecular orbitals.
  • π*-orbitals have one nodal plane.
  • px and pz atomic orbitals generate σ2p molecular orbitals.
  • Atomic orbitals that take part in the formation of chemical bonds by in-phase combination are σ-orbitals.
  • In σ molecular orbitals, the electron density is higher and the energy is lower.
  • σ and π bonds are distinguished by their orientation relative to the bond axis, with σ bonds being parallel and π bonds being perpendicular.
  • The in-phase combination of atomic orbitals may form a σ bond.
  • A π covalent bond is formed by the lateral overlap of orbitals.

Test your knowledge of bonding and antibonding orbitals in chemistry with this quiz. Learn about the differences between the two types of orbitals, their roles in chemical bonding, and their effects on the shape of molecules.

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