Potassium

Element Name: Potassium


 * Element Symbol:** K


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


 * Atomic Number:** 19


 * Protons:** 19


 * Electrons:** 19


 * Discovery:** Potassium was discovered in 1807 by Sir Humphry Davy.


 * How it was Named:** Potassium comes from the word "potash". Potash is a powdery salt used primarily in fertilizers.


 * State of Matter:** Solid


 * Melting Point:** 63.38 °C


 * Boiling Point:** 759 °C


 * Characteristics:**
 * Soft, waxy metal
 * Silver when freshly cut
 * Begins to tarnish toward grey immediately in air


 * Uses of Potassium:** Potassium hydroxide is used to make soaps, drain cleaners, and detergents. Potassium is also found in foods.


 * Interesting Facts:**
 * Potassium is the 8th most abundant element on earth.
 * Potassium is the least dense metal.

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