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Published byGiles Robertson Modified over 6 years ago
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To Do 7th Lon-Capa assignment due Friday, April 8th by 10 pm.
Quiz #5 on Wednesday, April 13 in Discussion. Continue reading Chapter 8 and doing the suggested homework.
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Elements/Ions Do Not “Want” To Lose Electrons!
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Electron Affinity
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Elements/Ions Do Not “Want” To Lose Electrons!
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A Covalent Bond
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Clicker Question Imagine the bond formed in the carbon monoxide molecule (C-O). Which atom would you expect to have a greater attraction for the electrons in the bond? a) carbon b) oxygen c) They have the same attraction (both have n=2 as highest energy level with an electron). d) I do not know.
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Electronegativity
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Bond Types
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Bond Types
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A Polar Bond
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Clicker Question Rank the following bonds from least polar to most polar: Si-Cl P-Cl Mg-Cl S-Cl A) S-Cl, P-Cl, Mg-Cl, Si-Cl B) P-Cl, S-Cl, Si-Cl, Mg-Cl C) Mg-Cl, Si-Cl, P-Cl, S-Cl D) Mg-Cl, S-Cl, P-Cl, Si-Cl E) S-Cl, P-Cl, Si-Cl, Mg-Cl
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From the Periodic Table…
Electron configurations Charges for ions in compounds (and thus formulas for compounds) Trends Atomic radius Ionization energy Electronegativity Polarity of Bonds
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Former Clicker Question
The following chemical reaction releases heat: A2 + B2 2AB. This means: more stable higher average bond energies a) Reactants Reactants b) Reactants Products c) Products Products d) Products Reactants e) I do not know.
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Lewis Structures Determine the total number of valence electrons in the molecule. Form at least one bond between atoms in the molecule (a pair of electrons is a bond) Arrange the rest of the electrons (in pairs) to satisfy the octet rule or duet rule (for hydrogen). Watch for exceptions.
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