CHEM 230 Lecture Notes - Nutrient, Bond Length, Iodine
2 Mar 2014
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Document Summary
Main group chemistry: chemistry of the s- and p-block elements, only part of periodic table containing non-metals, (metals) / (semi-metals or metalloids) / (non-metals, trend from metals to non-metals, electrical properties: metals. Non-metals: bonding in metals: localized metal-metal bonding is not possible, understood via band theory: C (5. 39ev); si(1. 10ev); ge(0. 66ev); sn(0. 08ev: n- and p-type semiconductors doping with group 13 or 15, p-type - positive hole, doped with group 13 (e. g. ga doped si, n-type negative hole, The chemistry of hydrogen: brief look at properties and reactivity, great importance in theoretical chemistry, most abundant element in universe, 3rd on earth (o and si) Properties a colourless odourless gas at 298 k: isotopes: deuterium ( ) and tritium ( ) The hydrogen ion (proton: ionization energy, forms the oxonium ion in solution: Hea : overall energy to form h- (g) = +145 kj/mol, compare to f- (g) = -249 kj/mol and cl-
