Welcome to the Elemental Exploration

Discover the Elements of the Universe

Oxygen

Element Information

Symbol: O

Atomic Number: 8

Atomic Mass: 15.999 u

O

Oxygen is a highly reactive non-metal and oxidizing agent that readily forms oxides with most elements as well as with other compounds. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium.

It is essential for respiration in most living organisms and is used in various industrial processes.

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