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Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element and oxidizing agent that readily forms compounds (notably oxides) with most elements. Photosynthesis releases oxygen, and respiration consumes oxygen.
Both 0 and 02 are oxygen. 02 is the naturally occuring oxygen that we all need to breathe. It is made up of 2 O atoms and it is how it is found in its common state eg room temp, normal pressure. 0 is an oxygen atom (note:singular).This is not naturally occuring but can be manipulated into this state through reactions and temp/pressure control.elevance. Rating Newest Oldest. Best Answer: Oxygen when it is first produced is in the form of atoms but because of its structure very quickly joins up with another oxygen atom to form an oxygen molecule O2. Others that do the same include H2, N2.F2 (NOT FL2!!!) He, Ne etc don't.