Potassium


 * Element Name:** Potassium


 * Element Symbol:** K


 * Atomic Mass:** 39[[image:Potassium_Mina.png width="216" height="288" align="right"]][[image:potassium.gif width="288" height="216" align="right"]]


 * Atomic Number:** 19


 * Protons:** 19


 * Neutrons:** 19


 * Discovery:** Sir Humphry Davy discovered potassium in 1807.


 * How Was It Named:** Comes from the English word "potash".


 * State of Matter:** Solid


 * Melting Point:** 63 Degrees Celcius


 * Boiling Point:** 759 Degrees Celcius


 * Characteristics:** It is easily cut with a knife. It reacts with oxygen to form potassium superoxide. It reacts with water to form potassium hydroxide. It oxides rapidly in air. It usually catches fire while reacting with water. Potassium is found in bananas.


 * Uses of Element:** It is used in fertilizers, as a salt substitute, and to produce other chemicals.
 * Interesting Facts:** It is the 8th most abundant element on Earth. It is found in ancient lake or sea beds.

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