Oxygen is a non-metal with an atomic number of 8 and average atomic mass of 15.994. It has an electron configuration of [He]2s22p4 and is in group 16 of the periodic table. Water (H2O) is a basic compound for life that can be found as a gas, liquid, or solid and is the main component of foods and drinks. Carbon dioxide (CO2) is a gas released by food and found in soda; it can also be found as a solid called dry ice. Sodium bicarbonate (NaHCO3) reacts with acids to release carbon dioxide and is used in cooking and baking to help dough rise.