O
Oxygen (Atomic Number 8)
Category: reactive-nonmetal | Period 2, Group 16 | Block: p
Highly reactive gas essential for aerobic respiration and combustion.
Atomic & Physical Constants
- Standard Atomic Weight:
- 15.999 u
- Standard State Phase:
- Gas
- Electron Configuration:
- 2, 6
- Electronegativity (Pauling):
- 3.44
- Melting Point:
- 54.36 K
- Boiling Point:
- 90.188 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Cellular respiration, steel combustion, medical oxygen support
Discovery History
Discovered by Carl Wilhelm Scheele (1774).
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