a metallic element that is important in body functions such as regulation of blood pressure and of water content in cells, transmission of nerve impulses, digestion, muscle contraction, and heartbeat.
出典:Wikipedia
出典:『Wikipedia』 (2011/06/10 21:31 UTC 版)
Potassium ( /pɵˈtæsiəm/ po-tas-ee-əm) is the chemical element with the symbol K (Neo-Latin kalium) and atomic number 19. Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water, generating sufficient heat to ignite the hydrogen emitted in the reaction.