The atmosphere is a mixture of gases ... That leaves approximately 1%, which is made up of atoms of unreactive argon, and molecules of carbon dioxide. Carbon dioxide is a product of respiration ...

SINCE most high-temperature chemical systems are sensitive to small partial pressures of oxygen in argon, which is commonly used as an inert atmosphere, it is of interest to know the oxygen ...

down to Earth, highlighting unique properties of air's main ingredients: nitrogen, oxygen, argon and water. But things really get interesting as stealthy, one-in-a-billion types of chemicals are ...