SODIUM..... DEFINE...?
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Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na. The free metal does not occur in nature, and must be prepared from compounds.
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A silver-white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically — see Chemical Elements Table.
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