Question

what is oxygen? ? ? ? ? ? ? ? ? ?​

Answer 1

Answer:

Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds

Explanation:

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Answer 2

Answer:

Oxygen is important to every cell in your body. Oxygen, through a process called oxidation, chemically changes food and liquid into energy. A chemical element that constitutes 21 percent of the Earth's atmosphere, that is capable of combining with all elements except some noble gases, that is active in physiological processes of almost all known organisms, and that is involved especially in combustion — see Chemical Elements Table.