Coordinate Bond

COORDINATE BOND

Dative bond or semi-polar bond.

METALLIC BOND

The bonding which holds metals atoms firmly together on account of force & attraction between metal cation and mobile sea electrons is called metallic bonding.

PROPERTIES OF METALS & NON METALS

LANDON FORCES AND DISPERSION FORCES

London forces between two Helium atoms

DIPOLE - DIPOLE FORCES

Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of the dipoles  possess partial charges, and these charges are shown by Greek letter delta (δ). Partial charges are always less than the unit electronic charge. The polar molecules interact with neighboring molecules.

Dipole-dipole interaction energy between stationary polar molecules (as in solids) is proportional to ,  Where r is the distance between polar molecules.

DIPOLE INDUCED DIPOLE FORCES

This type of attractive forces operate between the polar molecules having permanent dipole and the molecules lacking permanent dipole.

Permanent dipole of the polar molecule induces dipole on the electrically neutral molecule by deforming its electronic cloud