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- OXYGEN
- Atomic symbol - O
- Atomic weight - 15.9994
- Atomic number - 8
- Electron configuration - 2-6
- Oxidation states - -2
- State of matter - gas
- Non-metal
- Discovered in 1774 by Joseph Priestly
- Boils at -183 ¯C, melts at -218.4 ¯C
-
- Notes:
- Oxygen is commercially prepared by the fractional distillation of liquid air.
- At high temperatures oxygen combines with most elements and many compounds,
- esspecially those containing carbon and hydrogen, to form oxides of all
- elements. Oxygen is necessary to sustain human life. A substance combining
- with oxygen is always oxidized, and all such combinations produce heat energy.
-