Question

1. The melting points of most metals are higher than most plastics because: lonic bonds are weaker than metallic bonds Van der Waals bonds are weaker than metallic bonds lonic and Van der Waals bonds are weaker than metallic bonds None of the above a. b. c. d. 2. A rubber band can stretch more than a metal paper clip because: Covalent bonds along polymer chains can stretch and rotate Covalent bonds along polymer chains can rotate and break Covalent bonds along polymer chains are strong, which prohibits chain movement. None of the above a. b. c. d. 3. In a crystalline material, defects in the structure: Can not exist Can be of several sizes and geometries Can exist only in ceramics None of the above a. b. C. d.

Answer 1

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