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Oxygen is an element with atomic number 8. O is the chemical symbol of oxygen. O2 is the molecular formula for oxygen as a gas, and it shows that there are two atoms of oxygen in one oxygen molecule.

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Oxygen (O2) is a gaseous chemical element essential for life. It makes up about 21% of Earth's atmosphere and is used by living organisms in the process of respiration to produce energy. Oxygen is also crucial for combustion and various chemical reactions.

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10mo ago
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Q: What is oxygen o2?
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