potassium / potash
Both the name of and the element potassium, element number 19, are derived from potash. Potassium was isolated from potash by British chemist Humphry Davy in 1807, as recorded in the Philosophical Transactions of the Royal Society of that year:
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Potassium and Sodium are the names by which I have ventured to call the two new substances.
Copyright 1997-2013, by David Wilton