Hydrogen bond

Ionic bond

Double covalent bond

Sigma (σ) bond

Pi (π) bond

Polar covalent bond

Dipole-dipole attraction when hydrogen is bonded to small highly electronegative atoms such as O, N and F

Electrostatic force of attractionmbetween oppositely charged ions

Occurs when two pairs of electrons are shared

Formed by end-on overlap of atomic orbitals

Formed by sideways overlap of atomic orbitals

Occurs when two pairs of electrons are not equally shared