- For sodium in the diet, see Edible salt.
Sodium is the chemical element in the periodic table that has the symbol Na (Natrium in Latin) and atomic number 11. Sodium is a soft, waxy, silvery reactive metal belonging to the alkali metals that is abundant in natural compounds (especially halite).
It is highly reactive, burns with a yellow flame, reacts violently with water and oxidizes in air, necessitating storage in an inert environment.
Notable characteristics
Like the other
alkali metals, sodium metal is a soft, light-weight, silvery white, reactive metal. Owing to its extreme reactivity, it occurs in nature only combined in compounds, never as a pure elemental metal. Sodium metal floats on
water and reacts with it violently, releasing heat and flammable
hydrogen gas, and forming a solution of the strong base
sodium hydroxide.
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