Potasium or Potassium: How To spell?
The word Potasium is misspelled against Potassium, a noun meaning "An Alkali element, occurring abundantly but always combined, as in the chloride, sulphate, carbonate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium)."