what is oxygen write in points
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Oxygen is a chemical element.
It has the symbol O and atomic number 8.
It is the third most common element in the universe, after hydrogen and helium.
Oxygen is more than a fifth of the Earth's atmosphere by volume.
In the air, two oxygen atoms usually join to make dioxygen (O.
Appearance: (O2); gas: colourless; liquid and
solid: pale blue
Allotropes: O2, O3 (ozone)
Heat of fusion: (O2) 0.444 kJ/mol
Molar heat capacity: (O2) 29.378 J/(mol·K)
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Answer:
Oxygen is a chemical element.
It has a symbol O
its atomic number is 8
It is a member of chalcogen group in the periodic table
It is a highly reactive non metal
and an oxidizing agent that readily forms oxides with most elements as well as with other compounds
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