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Unformatted text preview: 1 EXAM I MATERIALS SCIENCE I - MSE 150 SPRING 2009 HONOR CODE I PLEDGE MY HONOR THAT I HAVE NEITHER GIVEN OR RECEIVED AID ON THIS EXAMINATION. SIGNATURE _________________________________ PRINT NAME ________________________________ CAST YOUR VOTE TO DECIDE WHETHER THERE WILL BE A BONUS QUIZ ON WEDNESDAY, FEBRUARY 11, 2009 YES ______ NO ______ DO NOT TURN THIS PAGE UNTIL 10 MINUTES AFTER THE HOUR YOU HAVE 50 MINUTES TO COMPLETE THIS EXAM 2 (15 points) Definitions Provide the correct term for the following definitions. 1 - Polymers that undergo a chemical reaction to produce a rigid cross-linked network. Thermosetting 2 - Polymers with long molecular chains that are cross-linked but still exhibit the ability to stretch under a low stress. Elastomers 3 - Polymers that consist of long molecular chains with mainly covalent bonding in the chains and secondary bonding between the chains. Thermoplastics 4- Materials consisting of compounds of metals, nonmetals, and metalloids. Ceramics 5- Materials which are characterized by high thermal and electrical conductivity. Metals 6 - A directional primary bond resulting from the sharing of electrons Covalent 7 - A nondirectional primary bond resulting from electrostatic attraction. Ionic 8- A primary bond resulting from the sharing of delocalized electrons Metallic 9- Electrons in the outermost shells, which are most often involved in bonding Valence 10- A three-dimensional array of points in space in which all of the points has identical surroundings. Space Lattice 11 - A regular three-dimensional pattern of atoms or ions in space Crystal 12- A crystalline imperfection in which a lattice distortion is centered around a line....
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