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The chemical symbol for Oxygen is O2. It is the 8'th element in the Periodic Table (having 8 protons in its nucleas and 8 electrons surrounding it), therefore, atomic #8, and has an atomic weight of 16 due to the presence of 8 neutrons in the nucleas (electrons are presumed to weigh nothing, while protons and neutrons are given equal value). This will do for basic chemistry, at least.

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15y ago

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