What rocks use potasium 40 for dating
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Radiation from Potassium-40 – Is it dangerous?
Potassium-Argon Dating Methods: K-Ar and Ar-Ar Dating
Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. It was first isolated from potash , the ashes of plants, from which its name derives. In the periodic table , potassium is one of the alkali metals , all of which have a single valence electron in the outer electron shell, that is easily removed to create an ion with a positive charge — a cation , that combines with anions to form salts. Potassium in nature occurs only in ionic salts. Elemental potassium reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction, and burning with a lilac - colored flame. It is found dissolved in sea water which is 0.
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