Cl
Chlorine (Atomic Number 17)
Category: halogen | Period 3, Group 17 | Block: p
Yellow-green halogen gas with strong oxidizing properties.
Atomic & Physical Constants
- Standard Atomic Weight:
- 35.45 u
- Standard State Phase:
- Gas
- Electron Configuration:
- 2, 8, 7
- Electronegativity (Pauling):
- 3.16
- Melting Point:
- 171.6 K
- Boiling Point:
- 239.11 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Water purification, PVC plastics, disinfectants, pharmaceuticals
Discovery History
Discovered by Carl Wilhelm Scheele (1774).
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