@dadegroot @piggo oh, and #TodayILearned: #potassium, the common #English word for #Kalium, is derived from #pearlAsh's unpurified form: #potAsh:

<<potassium (n.)
metallic element, 1807, coined by English chemist Sir Humphry Davy from Modern Latin potassa, Latinized form of potash (q.v.). Davy first isolated it from potash. The chemical symbol K is from Latin kalium "potash," from Arabic al-qaliy "the ashes, burnt ashes" (see alkali).>>
https://www.etymonline.com/word/potassium