Ca
Calcium (Atomic Number 20)
Category: alkaline | Period 4, Group 2 | Block: s
Fifth most abundant element in Earth crust; mineral of bones and teeth.
Atomic & Physical Constants
- Standard Atomic Weight:
- 40.0784 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 8, 2
- Electronegativity (Pauling):
- 1
- Melting Point:
- 1115 K
- Boiling Point:
- 1757 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Cement, plaster of Paris, metal alloy refining, biological signals
Discovery History
Discovered by Humphry Davy (1808).
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