Potassium (K) in the periodic table — PeriodicTable

Potassium (K) in the periodic tablePotassium is element 19, an alkali metal of the s block, in group 1, period 4. Its ground-state configuration is [Ar] 4s1, and it usually shows the oxidation states 0, 1.It was discovered in 1807, by Davy.Name origin: New Latin potassa, 'potash' (kalium in Latin). Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

39.0983

Da

Electronegativity

0.82

First ionisation energy

418.8

kJ/mol

Covalent radius

196

pm

Van der Waals radius

275

pm

Melting point

336.53

K

Boiling point

1032

K

Density

0.862

g/cm³

Abundance

20900

mg/kg

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