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.
Confidence votes 8.1K. Oxygen is more electronegative than lithium, a metal. Oxygen has a tendency to gain two electrons so it will bond with two lithium atoms which have a tendency to donate one valence electron for bonding.Li2O.xygen has a tendency to gain two electrons so it will bond with two lithium atoms which have a tendency to donate one valence electron for bonding. Li2O.