Hydrogen Bonding

The hydrogen bond is really a special case of dipole forces. A hydrogen bond is the attractive force between the hydrogen attached to an electronegative atom of one molecule and an electronegative atom of a different molecule. Usually the electronegative atom is oxygen, nitrogen, or fluorine, which has a partial negative charge. The hydrogen then has the partial positive charge

Metallic Bonding

Metals tend to have high melting points and boiling points suggesting strong bonds between the atoms. Even a metal like sodium (melting point 97.8°C) melts at a considerably higher temperature than the element (neon) which precedes it in the Periodic Table.

Coordinate Covalent Bond

A covalent bond is formed by two atoms sharing a pair of electrons. The atoms are held together because the electron pair is attracted by both of the nuclei.

In the formation of a simple covalent bond, each atom supplies one electron to the bond - but that doesn't have to be the case. A co-ordinate bond (also called a dative covalent bond) is a covalent bond (a shared pair of electrons) in which both electrons come from the same atom.

Non Polar Covalent Bond

If the difference of electronegativity between two atoms is equal to 0, then it is said to non polar covalent bond. For example, H2, Cl2, N2, O2.

Polar Covalent Bond

If the difference of electronegativity between the two atoms is greater than 0 and maximum 1.7, it is termed as polar covalent bond. For example H2O.

Tripple Covalent Bond

If three pairs of electrons are shared between atoms, the bond is called tripple covalent bond. For example, in Nitrogen Molecule, Each N atom has 5 electrons in its valence shell and require 3 more electrons to complete its octate. So they share 6 electrons and form tripple covalent bond.

Double Covalent Bond

If two pairs of electrons are shared between two atoms, is called double covalent bond. For example in Oxygen molecule, both Oxygen atoms have 6 electrons in their valence shell and both require two two electrons to complete their octate. Therefore, they share 4 electrons (two pairs) forming double covalent bond. this bond is denoted by double lines.