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Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) 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 23 Na. The free metal does not occur in nature and must be prepared from compounds.
There are 20 isotopes of sodium ( 11 Na), ranging from 17. Na to 39. Na (except for the still-unknown 36 Na and 38 Na), [ 4] and two isomers ( 22m. Na and 24m. Na ). 23. Na is the only stable (and the only primordial) isotope. It is considered a monoisotopic element and it has a standard atomic weight of 22.989 769 28(2).
High sodium consumption (5 g or more of salt per day) and insufficient potassium intake (less than 3.5 grams (0.12 oz) per day) have been linked to high blood pressure and increased risk of heart disease, stroke, and kidney disease. [5] [6] As an essential nutrient, sodium is involved in numerous cellular and organ functions. Several national ...
In cell biology, extracellular fluid ( ECF) denotes all body fluid outside the cells of any multicellular organism. Total body water in healthy adults is about 50–60% (range 45 to 75%) of total body weight; [ 1] women and the obese typically have a lower percentage than lean men. [ 2] Extracellular fluid makes up about one-third of body fluid ...
Salt poisoning is an intoxication resulting from the excessive intake of sodium (usually as sodium chloride) in either solid form or in solution ( saline water, including brine, brackish water, or seawater ). Salt poisoning sufficient to produce severe symptoms is rare, and lethal salt poisoning is possible but even rarer.
Infobox references. Sodium metasilicate is the chemical substance with formula Na. 2SiO. 3, which is the main component of commercial sodium silicate solutions. It is an ionic compound consisting of sodium cations Na+. and the polymeric metasilicate anions [– SiO2−. 3 –] n. It is a colorless crystalline hygroscopic and deliquescent solid ...
Salt substitute. A salt substitute, also known as low-sodium salt, is a low-sodium alternative to edible salt (table salt) marketed to reduce the risk of high blood pressure and cardiovascular disease associated with a high intake of sodium chloride [ 1] while maintaining a similar taste. The leading salt substitutes are non-sodium table salts ...
Sodium voltage-gated channel alpha subunit 9 (also Nav1.7) is a sodium ion channel that in humans is encoded by the SCN9A gene. [5] [6] [7] It is usually expressed at high levels in two types of neurons: the nociceptive (pain) neurons at the dorsal root ganglion (DRG) and trigeminal ganglion; and sympathetic ganglion neurons, which are part of the autonomic (involuntary) nervous system.