Oxygen the visible spectrum of molecular oxygen O - Oxygen Oxygen gas was discovered by Swedish pharmacist, Karl Scheele in 1771. Comprising 87 percent of the oceans, one fifth of the atmosphere and six out of ten atoms on the crust, oxygen is the most abundant element on the surface of the earth. The oxide is neutral.
Crystal are cubic.
24.020397 MASS abund. This is not a publication of Phoenix College.