SolutionHW2-new - ME311 MATERIALS ENGINEERING HOMEWORK #2...

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ME311 MATERIALS ENGINEERING HOMEWORK #2 PROBLEM 1: Draw a sketch, similar to Figure 2.10 in the textbook, showing the atomic arrangement and bonding you would expect to find in a molecule of oxygen (O 2 ) and in a molecule of ethylene (C 2 H 4 ). SOLUTION: Oxygen Ethylene PROBLEM 2: H H H H C C O O
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What type of bonding would you expect for the following substances: Calcium (Ca), Germanium (Ge), Barium Sulfide (BaS) and pure H 2 ? SOLUTION: For calcium the bonding is metallic because Ca has two valence electrons that can freely move within the calcium atoms. For germanium, the bonding is covalent because each Ge atom, with its 4 valence electrons, can form 4 covalent bonds with other Ge atoms. For BaS, the bonding is predominantly ionic (but with some covalent character) on the basis of the relative positions of Ba and S in the periodic table (large difference in electronegativities). For H 2 , the bonding is covalent within a single H 2 molecule (H to H), but between H 2 molecules, the bonding is Van Der Waals. PROBLEM 3:
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This note was uploaded on 04/03/2012 for the course ME 311 taught by Professor Meyers during the Spring '08 term at University of Texas at Austin.

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SolutionHW2-new - ME311 MATERIALS ENGINEERING HOMEWORK #2...

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