Where was potassium discovered?

It was extracted from potash, so do I say it was discovered when extracted from potash or do I say where the scientist conducted the experiment? Which one is the answer I should use?

Answer:
Discovery
Potassium metal was first isolated by Sir Humphery Davy in 1807AD by the electrolysis of fused potassium hydroxide.

Sir Humphrey Davy in 1807 according to wikipedia. Potash and potassium have a huge huge history. Many of the early chemical discoveries do. Wikipedia is always a good place to go to for a quick basic and a lot of links.

Sir Humphery Davy discovered it in 1807

Potassium :
Potassium was discovered in 1807 by Sir Humphry Davy, who derived it from caustic potash (KOH). Potassium was the first metal that was isolated by electrolysis.

Potassium was not known in Roman times, and its names are not Classical Latin but rather neo-Latin.

The name kalium was taken from the word "alkali", which came from Arabic al qalīy = "the calcined ashes".
The name potassium was made from the word "potash", which is English, and originally meant an alkali extracted in a pot from the ash of burnt wood or tree leaves.

Sir Humphry Davy, 1st Baronet, FRS (17 December 1778 – 29 May 1829) was a British chemist and physicist. He was born in Penzance, Cornwall, United Kingdom and both his brother John Davy and cousin Edmund Davy were also noted chemists. Berzelius called Davy's 1806 Bakerian Lecture "On some Chemical Agencies of Electricity" "one of the best memoirs which has ever enriched the theory of chemistry." This paper was central to any chemical affinity theory in the first half of the ninteenth century.]

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Where was potassium discovered?

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