K
Potassium (Atomic Number 19)
Category: alkali | Period 4, Group 1 | Block: s
Essential alkali metal ion maintaining biological cell membrane potential.
Atomic & Physical Constants
- Standard Atomic Weight:
- 39.09831 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 8, 1
- Electronegativity (Pauling):
- 0.82
- Melting Point:
- 336.7 K
- Boiling Point:
- 1032 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Agricultural potash fertilizers, specialty soaps, glass production
Discovery History
Discovered by Humphry Davy (1807).
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