Hydrogen Bonding including BRIEF mentions to forces between non-metals and application of hydrogen bonding.

Hydrogen bonding can simply be defined as a strong type of intermolecular dipole-dipole attraction in which hydrogen is attracted to nitrogen, oxygen or fluorine. However, this does not take into account the reasons behind the attraction or why dipole-dipole attraction occurs. Covalent molecular substances do not carry a whole charge since no atoms within the molecule lose or gain electrons unlike with Ionic or Metallic bonding where ions or, in the case of metallic bonding, …

…lattice is dominated by a regular array of hydrogen bonds which space the water molecules further apart and therefore allows ice to float on top of water since it is less dense. Hydrogen bonding also plays a major role in determining the three-dimensional structure of a molecule as in the case of DNA where the hydrogen bonds between base pairs of adenine and thymine, as well as guanine and cytosine give DNA its double-helix structure.