POTASSIUM

Potassium

Potassium is a chemical element with symbol K 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 and burning with a lilac flame. Naturally occurring potassium is composed of three isotopes, one of which, 40K, is radioactive. Traces of this isotope is found in all potassium making it the most common radioactive element in the human body and in many biological materials, as well as in common building materials such as concrete.

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potassium

Noun

  1. A soft, waxy, silvery reactive metal that is never found unbound in nature; an element (symbol K) with an atomic number of 19 and atomic weight of 39.0983. The symbol is derived from the Latin kalium.


The above text is a snippet from Wiktionary: potassium
and as such is available under the Creative Commons Attribution/Share-Alike License.

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