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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.
16 Νοε 2024 · Most processes for the production of sodium involve the electrolysis of molten sodium chloride. Inexpensive and available in tank-car quantities, the element is used to produce gasoline additives, polymers such as nylon and synthetic rubber, pharmaceuticals, and a number of metals such as tantalum, titanium, and silicon.
13 Απρ 2023 · A layer of sodium hydroxide is formed when sodium combines with water vapor or moisture; this layer then absorbs carbon dioxide to generate sodium bicarbonate. Sodium does not react with nitrogen. Because of this, sodium is typically stored in nitrogen or other inert gases or liquids.
Sodium is the sixth most common element on Earth, and makes up 2.6% of the Earth’s crust. The most common compound is sodium chloride. This very soluble salt has been leached into the oceans over the lifetime of the planet, but many salt beds or ‘lakes’ are found where ancient seas have evaporated.
28 Σεπ 2011 · Sodium is produced in heavy stars, mainly when atoms of neon gain a proton. (The neon atoms were themselves produced by carbon atoms coming together in nuclear fusion reactions.)
Sodium is the fourth most abundant element on earth, comprising about 2.6% of the earth's crust; it is the most abundant of the alkali group of metals. It is now obtained commercially by the electrolysis of absolutely dry fused sodium chloride.
2 Μαΐ 2021 · The most common sodium compound is sodium chloride, or table salt. Molten sodium is used as a heat transfer medium in some fast nuclear reactors. Yellow street lights are yellow because the light is produced by ionizing sodium vapor.
