chemnotes - ~Hydroxyapatite in bones and teeth...

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Laura Simon Chem102 notes 4/23/07 Silicon : Discovered in 1824 by Berzelius Second most abundant element on earth (Si)2) Isotopes: 28/14 Si, 29/14 Si, 30/14 Si Si02 is sand, quartz, opal, amythest Glass= Si02, Na2O3, CaCO3 Cement=SiO2, Al2O3, CaCO3 Silicates: certain SiO4 to the 4- ions. ZrSiO4 = zircon, abrasives (toothpaste) Polysilicates: talc, mica, beryl, asbestos Silicones: contain Si-C bonds CH3 CH3 CH3 Ch3 …-O-Si-O-Si-O-Si-O-Si-O-…. CH3 CH3 CH3 CH3 Coulks, lubricants, ceramics, and “silly putty” Phosphorus : Discovered in 1669 byBrand. Isotopes: 31/15 P and 32/15 P (radioactive) Allotypes white, red, black heat Ca3(PO4)2 + C + SiO2 P4 + CO +CaSiO3 “white” =P4: two dots P two dots SP3 (109 degrees) angle strain P Lineeeee P Two dots P 3 ps in a triangle (60 degrees) (equilateral) Uses: H3PO4 in carbonated beverages ~ATP, ADP – biological energy storage and transfer
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Unformatted text preview: ~Hydroxyapatite in bones and teeth ~Fertilizers, toothpaste, baking powders ~(not in detergent anymore1) ~Red P fireworks and match heads ~Black P- semiconductor Sulfur : Isotopes: 32/16 S, 33/16 S, 34/16 S, 36/16 S (~95%), (~1%), (~4%) Major Allotype is S8 (ring) Mined by the Frasch Process. Used in gunpowder and in the volcanization of rubber: C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-S8 heat-C-C-C-C-C-C-C-C-C-C-C-C-S-S- S-S S-S C-C-C-C-C-C-C-C-C-C-C-C S8 +O2 SO2 + SO3 H2O H2O (ACID RAIN) H2 SO2 H2SO4 Sulfites Sulfates (preservatives) (fertilizers) H2S weak acid. rotten eggs CH3-S-CH3= gas leak smell (skunk smell, garlic, etc.) Amino acids: cystaine, cystine, methionine HS HS S-----------S CH2 CH2 CH2 CH2 CH CH CH CH- CO2H H2H C02H H2H CO2H H2H CO2H NH2...
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This note was uploaded on 10/26/2009 for the course CHEM 101 taught by Professor Monk,e during the Fall '08 term at University of Delaware.

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chemnotes - ~Hydroxyapatite in bones and teeth...

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