Oxygen
Atomic No:
8
Name:
Oxygen  ['ɔksidʒən]
Formula:
O
Molar Mass:
15.9994

Oxygen element has 8 protons, 8 neutrons and 8 electrons. Oxygen gas is about 21% of the atmosphere, and is essential for our respiration. Oxygen is widely existed in inorganic as well as organic compounds.

» Common Oxgen compounds:
• Water, H2O
• Oxygen Gas, O2
• Iron(III) Oxide, Fe2O3
• Silicon Oxide, SiO2
• Carbon Oxide, CO2
• Disulfur Pentaoxide, P2O5
• Sulfur Dioxide, SO2
• Calcium Oxide, CaO


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