Potassium
Potassium
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Potassium ΒΆ
AtomicNumber: 19
Element: Potassium
Symbol: K
AtomicMass: 39.098
NumberofNeutrons: 20
NumberofProtons: 19
NumberofElectrons: 19
Period: 4
Group: 1.0
Phase: solid
Radioactive: nan
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Alkali Metal
AtomicRadius: 2.8
Electronegativity: 0.82
FirstIonization: 4.3407
Density: 0.862
MeltingPoint: 336.5
BoilingPoint: 1032.0
NumberOfIsotopes: 10.0
Discoverer: Davy
Year: 1807.0
SpecificHeat: 0.757
NumberofShells: 4
NumberofValence: 1.0