Chemists use symbols and formulae to represent elements, ions and compounds. Word equations and balanced chemical equations model the changes that happen in chemical reactions. Hazards and risks - ...

The properties of elements and compounds can be explained by considering the different types of bonding present inside the molecules. All ionic compounds have a high melting point and boiling point.

Vol. 207, No. 1088, A Discussion on Bond Energies and Bond Lengths (Jun. 7, 1951), pp. 32-49 (18 pages) The theory of ionic-covalent resonance has been outlined. It has been emphasized that the ...