105 F11 Lecture 15 cmpd

105 F11 Lecture 15 cmpd - Two allotropes: O2 O3, ozone...

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Which is the acetate ion? A. C2O4- B. C2O42- C. HCO3- D. C2H3O2- E. C2H3O22-
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Today’s focus A brief look at some periodic properties and representative reactions.
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Periodic properties - alkali metals “Exist in nature as compounds” – why? Low ionization energies. Identification - Flame tests
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Alkali metals react with water Alkali metals movie
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*Alkali metal reactions w/ O2 Metal Oxide Ø 4 Li (s) + O2 (g)  2 Li2O (s) Metal Peroxide Ø 2 Na (s) + O2 (g)  Na2O2 (s) Metal Superoxide Ø K (s) + O2 (g)  KO2 (s)
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Alkaline Earth Metals How reactive would you expect the alkaline earths to be in comparison to alkali metals?
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Group 6A - Chalcogens Oxygen, sulfur, and selenium are nonmetals . Tellurium is a metalloid . The radioactive polonium is a metal .
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Oxides *Metal oxides are basic Ø CaO + H2O  ? Ø Indicator is phenolpthalein Pink is basic Colorless is neutral or acidic *Non-metal oxides - acidic Ø CO2 + H2O  H2CO3
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*Oxygen
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Unformatted text preview: Two allotropes: O2 O3, ozone Three anions: O2, oxide O22, peroxide O21, superoxide Tends to be an oxidizing agent Flaming ping pong ball of death Sulfur Most stable allotrope is S8, a ringed molecule. Group VIIA: Halogens Characteristically high ionization energies Highly negative electron affinities Group VIIA: Halogens Large, negative electron affinities Therefore, tend to oxidize other elements easily React directly with metals to form metal halides Na (s) + Cl (s) NaCl (s) Reactive! Chlorine gas Hydrogen and chlorine Aluminum bromide Sometimes H is found above alkali metals, other times above halogens. Why? Electron config.? IE? EA? Homeless hydrogen Group VIIIA: Noble Gases Why are noble gases naturally monatomic gases? Is there anything that reacts with noble gases?...
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This note was uploaded on 02/28/2012 for the course CHEM 105 taught by Professor Macedone during the Fall '07 term at BYU.

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105 F11 Lecture 15 cmpd - Two allotropes: O2 O3, ozone...

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