PERIODIC TABLE

Potassium

Atomic No. 19 K Potassium

About Potassium

Potassium is an alkali metal with atomic number 19 that forms compounds predominantly in the +1 oxidation state. Potassium carbonate is used in glass manufacture, while potassium hydroxide serves as an electrolyte in alkaline batteries. Potassium dihydrogen phosphate, commonly called KDP, is grown as a nonlinear optical crystal for laser systems.

Properties

Atomic Number
19
Atomic Symbol
K
Atomic Mass
39.0983
CAS No.
7440-09-7
Density
0.856 g/cm³
Series
alkali metal
Melting Point
63.38°C
Boiling Point
759°C
Thermal Conductivity
1 W/cm °C
Heat of Fusion
2.33 kJ/mol
Heat of Vaporization
76.9 kJ/mol
Electronegativity
0.82 pauling
Crystal Structure
Cubic
Electrical Conductivity
1.4×107 S/m

Potassium Products

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