- Physical Sciences
a chemical reaction in which a transfer of electrons takes place from one substance (the reducing agent) to another (the oxidising agent).
molecule where the ratio of atoms is 1 : 5, for example PCl5
a polymer used in manufacture of synthetic resins, fibres and plastics.
the sum of the number of protons and neutrons (the nucleons) in the nucleus of an atom. It...
forms between two atoms if the two atoms share six electrons.