| Introduction:
Oxygen is a colorless, odorless,
tasteless gas; In very low temperature or high pressure, oxygen can
be a pale blue liquid. Oxygen is the most abundant element in the
universe. It is the most abundant element in the earth's crust,
and it makes up almost 21% of the atmosphere.
It is important to learn more
about the properties of oxygen so we can benefit from it as
needed.
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