Symbol:
Ca
Atomic Number:
20
Atomic Weight:
40.078
Element Classification:
Discovered By:
Sir Humphrey Davy
Discovery Date:
1808 (England)
Name Origin:
Latin: calx, calcis (lime).
Density (g/cc):
1.55
Melting Point (K):
1112
Boiling Point (K):
1757
Appearance:
Fairly hard, silvery-white metal
Atomic Radius (pm):
197
Atomic Volume (cc/mol):
29.9
Covalent Radius (pm):
174
Ionic Radius:
99 (+2e)
Specific Heat:
0.653
Fusion Heat (kJ/mol):
9.20
Evaporation Heat (kJ/mol):
153.6
Thermal Conductivity (@25°C W/m K):
(201)
Debye Temperature (K):
230.00
Pauling Negativity Number:
1.00
First Ionizing Energy (kJ/mol):
589.4
Oxidation States:
2
Electronic Configuration:
[Ar] 4s2
Lattice Structure:
Face-Centered Cubic(FCC)
Lattice Constant:
5.580
Lattice C/A Ratio:
n/a
