Potassium

K
Potassium
Alkali Metal

 

Atomic number:
 19
Atomic weight:
 39.0983
Shells:
 2,8,8,1
Orbitals:
 [Ar] 4s1
Melting point:
 63.25°C
Boiling point:
 759.9°C
Covalent radius:
 2.03
Å
Atomic volume:
 45.46
cm³/mol
Atomic radius:
 2.77
Å
Ionic radius:
 1.51 (+1)
Å
Electronegativity:
 0.82
Oxidation states:
 
1st ionization pot.:
 4.3407
V
2nd ionization pot.:
 31.625
V
3rd ionization pot.:
 45.72
V
Specific heat:
 0.75
J/gK
Heat of fusion:
 2.334
kJ/mol
Heat of vapor.:
 79.870
kJ/mol
Thermal conduct.:
 1.024
W/cmK
Electrical conduct.:
 0.139
10^6/cm ohm
Density:
 0.862
g/cm³
Valence:
 1