Potassium is found in the minerals sylvite (KCl), carnallite (KCl.Davy used the same process to separate sodium a few months after finding potassium. Sir Humphry Davy obtained metallic potassium in 1807 by electrolysis of molten caustic potash (KOH).Although potassium is the eighth most plentiful element on the planet, accounting for around 2.1% of the earth’s crust, it is a highly reactive element that is never found free.Humphry Davy, a British chemist, isolated it for the first time in 1807 from potash electrolysis (KOH).The letter K is derived from the Latin word “ kalium,” which derives from the Arabic phrase “ qali,” which means alkali.Because it is found in caustic potash, the term originates from the English “potash” or “pot ashes” (KOH).See the fact file below for more information on Potassium, or you can download our 29-page Potassium worksheet pack to utilize within the classroom or home environment. Potassium also aids muscular contraction and maintains appropriate blood pressure. ![]() Its counterpart, sodium, maintains normal fluid levels outside of cells. Potassium can be found naturally in many foods and as a supplement. It is an alkali metal and is solid at ambient temperature. Potassium has the chemical symbol K and the atomic number 19.
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