20
40.08
Ca
Calcium
Identification
CAS Number: 7440-70-2
Discovery Year: 1808
Discoverer: Sir Humphrey Davy
Discovery Location: England
Properties
Atomic Dimensions
Atomic Radius: 180 pm →
Atomic Radius (Rahm): 270 pm
Covalent Radius: 176 pm →Van der Waals Radius: 231 pm
Metallic Radius: 174 pm
Atomic Volume: 29.9 cm³/mol
Lattice Constant: 5.58 Å
Thermodynamics
Electronic Structure
Electron Config: [Ar] 4s2
Block: s
Period: 4 →Group: 2 →Electronegativity: 1 →Electron Affinity: 0.02455 eV →Oxidation States: +2
Abundance & Geochemistry
Crust Abundance: 41500 mg/kg
Sea Abundance: 412 mg/L
Geochemical Class: major
Goldschmidt Class: litophile
About
Calcium is a soft gray alkaline earth metal. It is essential for life, being a major component of bones and teeth.
Isotopes
Ca-40 40 96.94%
Ca-44 44 2.09%
Ca-42 42 0.6470%
Ca-48 48 0.1870%
Ca-43 43 0.1350%
Ca-46 46 4.00e-3%
