![]() Potassium is a light, silvery-white element, a portion of the alkali group of the Potassium Periodic Table. It is found in seawater (which is 0.04% potassium by weight and transpires in many minerals such as orthoclase, a common constituent of granites, and other igneous rocks. Potassium in species occurs only in ionic salts. In the periodic table, potassium is one of the alkali elements, all of which have a single valence particle in the outer electron shell, that is simply transferred to form an ion with a positive charge – a cation, that connects with anions to produce salts. It was first separated from potash, the ashes of plants, from which its name originates. ![]() Potassium mineral responds rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of publication. Potassium is a silvery-white element that is flexible enough to be cut with a knife with a small force. Potassium superoxide (KO 2), is an orange solid used to release oxygen and absorb carbon dioxide in the respiration system for submarines, spacecraft, and mines.The Potassium Periodic Table is a chemical element with the name K and atomic number 19. One lesser-known use of potassium is as a portable oxygen source.Increasing the concentration leads to a bitter or alkaline flavor. Humans can taste potassium in aqueous solution.This means potassium is a solid at room temperature. The melting point of potassium is 63.4 degrees C or 336.5 degrees K and its boiling point is 765.6 degrees C or 1038.7 degrees K.Potassium metal has a density of 0.89 grams per cubic centimeter.The atomic weight of potassium is 39.0983.The most abundant isotope is K-39, which accounts for 93.3% of the element. Three isotopes of potassium occur naturally on Earth, although at least 29 isotopes have been identified.Potassium is the second lightest (least dense) metal after lithium.Element number 19 is the eighth most abundant element in the human body, accounting for between 0.20% and 0.35% of body mass. ![]()
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