Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an
element or compound ?
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Answer:
element
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Explanation:
Oxygen is an element. It resides on the periodic table as element #8 with and average Atomic Weight for the various stable isotopes (16, 17, and 18) of 15.9994 Atomic Mass Units.
This mix of isotopes in Earth’s atmosphere spontaneously combined as two atoms to form a molecule of Oxygen-2 at a Molecular Weight of 31.9988, usually reported as rounded up 32.
Oxygen exists in the atmosphere predominantly as the diatomic molecule. Atomic oxygen and Ozone (Oxygen-3) are more energetic, chemically reactive and less stable.
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