Element name : Potassium
Element symbol : K
Atomic number : 19
Atomic mass : 39.098
Melting point : 146.57 ° F
Boiling point : 1425.2 ° F
State of Matter at room temperature : Solid
Family : Alkali metal
Potassium is a Metal.
Potassium is one of the most reactive and electropositive elements . It is not considered a dangerous element. In water potassium spontaneously catches fire. There is no appearing hazard from handling potassium. Potassium is easily cut with a knife.
Potassium can be found in things like glass, soap, and fertilizers. It is also found in most soils .
Potassium can never be found in free nature. It is obtained by electrolysis of chloride or hydride. Metallic potassium is commercially available for forty dollars a pound. The atomic radius is 227 pm. The electron configuration is [Ar]4Są.
Potassium was discovered in 1807 by Sir Humphrey Davy. Potassium comes from the Latin word kalium (potash).
Sources used :
http://www.chemicalelements.com