20
40.078 u
Ca
Calcium
Alkaline Earth Metal
Atomic Structure
Physical State
Group
2
Period
4
Block
s
Electron Configuration
[Ar] 4s²
Physical Properties
Atomic Mass:
40.078 u
Electronegativity:
1
Atomic Radius:
231 pm
Ionization Energy:
6.113 eV
Density:
1.54 g/cm³
Melting Point:
1115 K
Boiling Point:
1757 K
Historical Information
Discovered By:
Humphry Davy
Year Discovered:
1808