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phosphorus
Molecular formula : P
MW : 30.97376
CAS :

density : 1.82
melting point : 44.1 ° C
Boiling Point : 257 ° C
traits : a colorless to pale yellow solid cereus, the phosphorescence in the dark, offensive as the agency warned.
dissolved : almost insoluble in water, soluble in ethanol and difficult glycerol, more soluble in ether, benzene, carbon disulfide, etc..
purposes : phosphate in all biological energy transfer processes, such as metabolism, photosynthesis, nerve and muscle function play activities for the important role. For two-thirds of the phosphorus fertilizer, but also for the manufacture of phosphoric acid, fireworks, matches, pesticides and detergents (3 poly phosphate), but the latter negative impact on the ecological environment greatly.
preparation or sources : the main ore is apatite. From calcium phosphate (ashes, apatite, etc.) with a total of silica and carbon in the furnace heat, generated by the rapid cooling of phosphorus vapor derived.
Note : highly toxic, together with steam volatile. At 34 ° C for fire, 60 ° C in air burning themselves into white smoke. Atomic number 15, atomic weight 30.973761, valence +1, ± 3, +5. Monomer with a three-allotropism : white phosphorus (phosphorus), red phosphorus, and phosphorus. White phosphorus under high pressure heating, while the slightly metallic black phosphorus, can conduct electricity, do not dissolve in common solvent and stable. Oxides dissociation (Do) : 6.1 (eV) elements of ionizing energy (Ei) : 10.48 (eV), the main absorption lines and its main parameters : adding -------------------- abroad -- abroad -- abroad -- abroad -------------------- abroad -- abroad -------------------- rural -- λ (nm) -- f -- W -- F -- S * CL -- R -- S -- East -------------------- 250,000 -- 250,000 -- 250,000 -- 250,000 -- 250,000 -- -- 250,000 -------------------- things -- 213.6 (D) 0.2 -- -- N-A -- -- 1.0 2.6 -- -- 0.2 214.9 -- N-A -- -- 20 -- 177. 5 -- -- -- -- ?-------------------- Demonstration Demonstration -- -- -- Demonstration Demonstration -------------------- Demonstration -- Demonstration -------------------- granted λ : wavelength f : oscillator strength W : monochromator-band spectra of N-A ( nitrous oxide-acetylene flame) S * : Elements of the characteristics of concentration (1% absorption sensitivity) CL : Elements of the detection limit R S : major elements of the same absorption lines between the relative sensitivity F : Flame types
categories : single quality

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More Detailed Data:
1) phosphorus
2) Phosphorus;phosphorous, yellow;phosphorous ,red
3) phosphorus
4) phosphorus
5) Phosphorus red;Phosphorus
6) phosphoruswhite;phosphorusyellow
7) phosphoruswhite;phosphorusyellow
8) ferrophosphorus
9) ferrophosphorus
10) ferrophosphorus
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