Chemistry Review - Chemistry Review -Covalent bond between...

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Chemistry Review -Covalent bond – between 2 non-metals -Metallic bond- a sea of mobile electrons -lattice enthalpy- the energy change at constant pressure when 1 mol of an ionic solid is broken into ions of its component elements in gaseous form at 298K, 1 atm -Electronegativity increases Left Right , Down Up -VSEPR model -effective charge = protons – inner electrons -greater the eff. Charge, stronger the attraction b/w protons/electrons, smaller the radii -photoelectric effect -when light of sufficient minimum energy strikes a metal cathode, electrons are knocked off its surface, travel to an anode, and form a current through a circuit -1) Electrons can be ejected only if the light is sufficiently energetic. Electron ejection is independent of time or intensity. The mini-mum energy varies by element. 2) The current increases with increasing intensity and is independent of color. Therefore, light is made up of photons, each having a particular amount of energy that can be transferred to an electron during a collision. If the energy is
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This note was uploaded on 11/18/2010 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.

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Chemistry Review - Chemistry Review -Covalent bond between...

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