Atomic Number: 8
Abbreviation: O

Oxygen (chemical symbol O and atomic number 8) is a chemical element. It is a gas at room temperature.

Oxygen is very important for life on earth. The atmosphere of the earth consists of approximately 21% oxygen. Humans and animals must breathe oxygen in order to live, and plants give off oxygen. Water (H2O) is a well-known chemical compound, which consists of one oxygen atom.

Combustion, or burning, is caused by the reaction of oxygen and another element or compound.

Previous Element                                                                                                                          Next Element

Community content is available under CC-BY-SA unless otherwise noted.