Methane combustion reaction, Animation showing the reaction between methane (CH4) and oxygen (O2) at a molecular level. The molecules are shown as colour-coded atoms: carbon (grey), hydrogen (white) and oxygen (red). A single tetrahedral methane molecule is shown reacting with two linear diatomic oxygen molecules (which each have a double bond). The products are a molecule of carbon dioxide gas (CO2) and two molecules of water (H2O). Several such reactions are shown.