Oxygen's atomic number is 8 and its atomic mass is 15.9984. Its period number is 2 and its group is 16. The group name is chalcogens. Oxygen's state of matter is gas. Gas is a non-metal.
Gotta have oxygen to survive or our organs would immediately shut down.
Oxygen and fuel gases are used to cut metal.
Oxygen is an element in the compound nitric acid along with other compounds.