Symbol:
K
Atomic Number:
19
Atomic Weight:
39.0983
Element Classification:
Discovered By:
Sir Humphrey Davy
Discovery Date:
1807 (England)
Name Origin:
English: pot ash; symbol from Latin: kalium, (alkali).
Density (g/cc):
0.856
Melting Point (K):
336.8
Boiling Point (K):
1047
Appearance:
Soft, waxy, silvery-white metal
Atomic Radius (pm):
235
Atomic Volume (cc/mol):
45.3
Covalent Radius (pm):
203
Ionic Radius:
133 (+1e)
Specific Heat:
0.753
Fusion Heat (kJ/mol):
102.5
Evaporation Heat (kJ/mol):
2.33
Thermal Conductivity (@25°C W/m K):
79.0
Debye Temperature (K):
100.00
Pauling Negativity Number:
0.82
First Ionizing Energy (kJ/mol):
418.5
Oxidation States:
1
Electronic Configuration:
[Ar] 4s1
Lattice Structure:
Body-Centered Cubic(BCC)
Lattice Constant:
5.230
Lattice C/A Ratio:
n/a
