A model of the iron sulphide crystal | Gebruik van Google forms om data in te samel. | Scoop.it

 Water (H2O), for example, is a compound that is made up of two hydrogen atoms for every one oxygen atom. Sodium chloride (NaCl) is a compound made up of one sodium atom for every chlorine atom. An important characteristic of a compound is that it has a chemical formula, which describes the ratio in which the atoms of each element in the compound occur.

Via Chipa Thomas Maimela