MIDTERM: MATSE 201 Exam

MIDTERM: MATSE 201 Exam 1. Which is true regarding the crystal systems? A) they completely define a crystal structure B) they describe the shape of the unit cell. C) there are 7 shapes that can completely fill 3D space through translational symmetry D) all of the above. Points Earned: 2.0/2.0 Correct Answer(s): C 2. Which of the following is NOT one of the 7 crystal systems? A) Tetragonal B) Rhombohedral C) Trigonal D) Face centered cubic Points Earned: 2.0/2.0 Correct Answer(s): D 3. Elemental metals do not commonly crystallize in which of the following lattices A) simple cubic B) face-centered cubic C) hexagonal close packed D) body centered cubic. Points Earned: 2.0/2.0 Correct Answer(s): A 4. Which direction has the highest linear density in a crystal of Cu that crystallizes in the fcc?