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Not too many people know, or care, that potassium is a silvery metal. A good reason for this is that it only stays a metal in the vacuum of space or when surrounded by a noble gas. The slightest trace of oxygen - or most any other element for that matter - quickly reacts with it to form compounds.
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9 Φεβ 2019 · Potassium Metal Element 19 Sample K, Pure 1 gram 99,8% Pieces Under Mineral Oil in Labeled Glass Vial: Amazon.com: Industrial & Scientific
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Pure Potassium Metal High Purity Glass Ampoules Oxide Free Breakseal Kalium Rare Alkali Metal 99.9% (40g)
