Oxygen has a boiling point of minus 297.31 degrees Fahrenheit or minus 182.95 degrees Celsius and a melting point of minus 361.82 degrees Fahrenheit or minus 218.79 degrees Celsius. Oxygen is a gas at room temperature and is classified as a non-metal.
Oxygen appears on the periodic table under its atomic number of 8 and its atomic weight of 15.9994. It is the third most abundant element in the universe and makes up nearly half the mass of Earth's crust. Oxygen is removed from liquefied air by fractional distillation and is produced through the electrolysis of water. It is highly reactive and combines with most elements.