The Potassium Periodic Table is a chemical element with the name K and atomic number 19. Potassium is a silvery-white element that is flexible enough to be cut with a knife with a small force.Potassium mineral responds rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of publication. It was first separated from potash, the ashes of … [Read more...] about Properties of Potassium Periodic Table Elements & Atomic Mass [PDF]