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30 cze 2023 · Chemistry of Phosphorus. As a member of the Nitrogen Family, Group 15 on the Periodic Table, phosphorus has 5 valence shell electrons available for bonding. Its valence shell configuration is 3s 2 3p 3. Phosphorus forms mostly covalent bonds. Any phosphorus rock can be used for the production of elemental phosphorus.
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Phosphorus is a chemical element; it has symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.
It forms the sugar-phosphate backbone of DNA and RNA. It is important for energy transfer in cells as part of ATP (adenosine triphosphate), and is found in many other biologically important molecules. We take in about 1 gram of phosphate a day, and store about 750 grams in our bodies, since our bones and teeth are mainly calcium phosphate.
Phosphates are good leaving groups. In biology magnesium-diphosphophate is the most common leaving group. In acid-hydrolysis of trimethyl phosphate, C-O bond cleavage competes with P-O bond cleavage because phosphates are good leaving groups and it is difficult to attack a phosphate. Phosphites hydrolyze much faster than phosphates. phosphite ..
21 paź 2024 · phosphorus (P), nonmetallic chemical element of the nitrogen family (Group 15 [Va] of the periodic table) that at room temperature is a colourless, semitransparent, soft, waxy solid that glows in the dark. How urine led to significant discoveries in chemistry Learn about the history of urine in alchemy and chemical experiments.
16 sty 2023 · Phosphorus is found extensively non-crystalline phosphate rocks such as apatite, Ca 3 (PO 4) 2.CaX 2 where X-= F-and/or Cl-and/or OH-. Arsenic, antimony and bismuth come mainly from sulphide ores such as mispickel, FeAsS, and stibnite, Sb 2 S 3 .
Phosphorus undergoes spontaneous ignition in air and forms pentoxide (P 4 O 10). There are two allotropic forms of phosphorus, red and black, that differ in physical and chemical properties. Red phosphorus (which is formed by heating of white phosphorus at high temperature) ignites on friction.
