Before revision: In the following redox reaction, hazardous sodium metal reacts with toxic chlorine gas to form the ionic compound sodium chloride, or common table salt: 2Na(s) + Cl2(g)->2NaCl(s) In the reaction, sodium metal goes from an oxidation state of 0 ( as it is a pure element) to +1: in other words, the sodium lost one electron and is said to have been oxidized.
After revision: In the following redox reaction, hazardous sodium metal reacts with toxic chlorine gas to form the ionic compound sodium chloride, or common table salt: 2Na(s) + Cl2(g)->2NaCl(s) In the reaction, sodium metal goes from an oxidation state of 0 ( a pure element) to +1: in other words, the sodium lost one electron and is said to have been oxidized.