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Sodium is a chemical element with symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal.
The sodium–potassium pump, a critical enzyme for regulating sodium and potassium levels in cells. Sodium ions (Na +) are necessary in small amounts for some types of plants, [1] but sodium as a nutrient is more generally needed in larger amounts [1] by animals, due to their use of it for generation of nerve impulses and for maintenance of electrolyte balance and fluid balance.
Disk containing 1 μCi of sodium-22. Sodium-22 is a radioactive isotope of sodium, undergoing positron emission to 22 Ne with a half-life of 2.6019(6) years. 22 Na is being investigated as an efficient generator of "cold positrons" to produce muons for catalyzing fusion of deuterium.
Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na 2 SO 4 as well as several related hydrates.All forms are white solids that are highly soluble in water.
Sodium chloride / ˌ s oʊ d i ə m ˈ k l ɔːr aɪ d /, [8] commonly known as edible salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chlorine ions.
Sodium azide is an ionic solid.Two crystalline forms are known, rhombohedral and hexagonal. [1] [6] Both adopt layered structures.The azide anion is very similar in each form, being centrosymmetric with N–N distances of 1.18 Å.
Sodium metasilicate is the chemical substance with formula Na 2 SiO 3, which is the main component of commercial sodium silicate solutions. It is an ionic compound consisting of sodium cations Na +
A FASOR used at the Starfire Optical Range for LIDAR and laser guide star experiments is tuned to the sodium D2a line and used to excite sodium atoms in the upper atmosphere.