8-29-07 - 115 Known Elements Chemical Bonding Concepts:...

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Molecules – chemical formula - Stoichiometry -chemical equations Principle of detailed balance (i.e. 2Na + Cl2 2NaCl ) Mole (avogadro’s number) – 6.02*10^23 atoms per mol (know how to : [Mass <-> Mole <-> #Atoms/Mol] conversions) 22.4L occupied at STP (0 degrees C, 1 atm) Angstrom = 1*10^-10 m Radius of Hydrogen atom = 53 picometer Mm – 1*10^-3 m Micrometer – 1*10^-6 m Nm – 1*10^-9 m Pm – 1*10^-12 m Understand… why some molecules may be poor fuels, what states of matter are occupied just by formulas, and reasons for melting points of certain molecules, or why some are unstable and cant exist
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Unformatted text preview: 115 Known Elements Chemical Bonding Concepts: Chemical Bond-Classic Description : Covalent (shared perfectly), Ionic, Polar Covalent (shared unequally)- Classified by Electronegativity- Quantum Mechanical Description : Mathematically rigorous, precisely describes bonds-Molecular Orbital Theory Periodic Table 115 Known Elements- Metals [Left of PT], Metalloids (semi-metals), Non-Metals [Right of PT]-Metals : Conductors, Positive ions, ionic hydrides-Metalloids : volatile hydrides-Non-Metals: Non-conductors, volatile hydrides...
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This note was uploaded on 04/07/2008 for the course CHEM 146 taught by Professor Reutt-robey during the Fall '07 term at Maryland.

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8-29-07 - 115 Known Elements Chemical Bonding Concepts:...

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