Diese Website erfordert, dass Javascript aktiviert ist. Bitte stellen Sie Ihren Browser in den Werkzeugen oder im Bereich Konfiguration enstprechend ein.

Element Search

Potassium (19K39.0983)
[7440-09-7]

Select a form or compound to view products.

Elemental Form

Potassium is silvery-white, soft, and light. It is the second lightest known metal (lithium is the first). Never found native, potassium is found in minerals in most soils. It is an essential componenet for plant growth and in human and animal nutrition. Since it is one of the most electropositive metals, potassium is very reactive. Like other alkali metals, it decomposes and can ignite spontaneously in water.
Melting Point63.3°CBoiling Point760°C
Density0.856g/cm3Themal Conductivity0.24cal/cm2/cm/s/°C
Specific Heat @ 25°C0.177cal/g°CHeat of Fusion14.6k-cal/g-atom
Heat of Vaporization496.0k-cal/g-atomAtomic Volume45.3W/D
First Ionization Energy100K-cal/g-moleElectronegativity0.8Pauling's
Covalent Radius2.03AngstromsMohs Hardness @ 20°C0.5
Electrical Resistivity @ 200°C21.85µΩ-cmCrystal StructureCubic, body centered