Commutator (electric) A commutator is a moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine.
The word equation that would represent the formation of lithium oxide from lithium metal and oxygen is: lithium + oxygen to lithium oxide. In chemical symbols, the balanced chemical equation is expressed as: Li + O2 = Li2O.
Scheme of the formation of an oxide by equalization of electronegativity. Expression (2) can be simplified. Indeed, the stoichiometry of a simple oxide (m and n) is connected to the oxidation number z of the cation: z =2 n / m. Related to that, Duffy [2] showed graphically the correlation between Ï O â and Ï M.