Symbol - K


Name: Potassium
Symbol: K
Atomic Number: 19

Number of Protons/Electrons: 19

Number of Neutrons: 20

Description:Potassium is a metal and is the seventh most abundant and makes up about 1.5 % by weight of the earth's crust. Potassium is an essential constituent for plant growth and it is found in most soils. It is also a vital element in the human diet.

Where is Potassium found in Nature?

Potassium is never found free in nature, but is obtained by electrolysis of the chloride or hydroxide, much in the same manner as prepared by Davy. It is one of the most reactive and electropositive of metals and, apart from lithium, it is the least dense known metal. It is soft and easily cut with a knife. It is silvery in appearance immediately after a fresh surface is exposed.

Potassium Rich Foods!

Baked Potatoes (With Skin)

Potassium 100gAverage Potato (173g)

535mg (15% DV)926mg (26% DV)


Potassium 100gAverage Banana(118g)1 Cup Mashed (225)

358mg (10% DV)422mg (12% DV)806mg (23% DV)


Potassium 100gAverage Avocado (201g)1/2 Cup Pureed (115)

485mg (14% DV)975mg (28% DV)558mg (16% DV)


Potassium was discovered by Sir Humphrey Davy at 1807 in England.

Origin of name: from the English word "potash" (pot ashes) and the Arabic word "qali" meaning alkali (the origin of the symbol K comes from the Latin word "kalium").

Uses: *It is primarily used in fertilizers as either the chloride, sulfate or carbonate - not as the oxide.

* Potassium hydroxide is an important industrial chemical used as a strong base.

* Potassium nitrate is used in gunpowder (black powder). An older term for KNO3 is saltpeter.
* Potassium carbonate, known as potash, is used in glass manufacturing.
* Glass treated with liquid potassium is much stronger than regular glass.