Chemical Element with the symbol O and a atomic number of 8. The air is about 20% oxygen the rest is Nitrogen and other gases. Oxygen is an odorless, tasteless, colorless gas. Oxygen is nessecary for your survival. Oxygen is also pesky because it oxidizes everything an exsample of the is the rust on Iron. In nature it is found as O2 as of most gases are. When oxygen is a liquid it is a pale blue.
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