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9.7 End-of-Chapter Material
Additional Exercises
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Explain why iron and copper have the same Lewis electron dot diagram when they have different numbers of electrons.
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Name two ions with the same Lewis electron dot diagram as the Cl− ion.
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Based on the known trends, what ionic compound from the first column of the periodic table and the next-to-last column of the periodic table should have the highest lattice energy?
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Based on the known trends, what ionic compound from the first column of the periodic table and the next-to-last column of the periodic table should have the lowest lattice energy?
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P2 is not a stable form of phosphorus, but if it were, what would be its likely Lewis electron dot diagram?
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Se2 is not a stable form of selenium, but if it were, what would be its likely Lewis electron dot diagram?
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What are the Lewis electron dot diagrams of SO2, SO3, and SO42−?
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What are the Lewis electron dot diagrams of PO33− and PO43−?
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Which bond do you expect to be more polar—an O–H bond or an N–H bond?
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Which bond do you expect to be more polar—an O–F bond or an S–O bond?
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Use bond energies to estimate the energy change of this reaction.
C3H8 + 5O2 → 3CO2 + 4H2O -
Use bond energies to estimate the energy change of this reaction.
N2H4 + O2 → N2 + 2H2O -
Ethylene (C2H4) has two central atoms. Determine the geometry around each central atom and the shape of the overall molecule.
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Hydrogen peroxide (H2O2) has two central atoms. Determine the geometry around each central atom and the shape of the overall molecule.
Answers
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Iron has d electrons that typically are not shown on Lewis electron dot diagrams.
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LiF
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It would be like N2:
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an O–H bond
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−2,000 kJ
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trigonal planar about both central C atoms
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