《Exercise---chapter-12》由会员分享，可在线阅读，更多相关《Exercise---chapter-12（12页珍藏版）》请在金锄头文库上搜索。
1、Exercise-chapter 121) A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n) _ solid.A) ionic B) molecular C) metallic D) covalent network E) metallic and covalent network2) Crystalline solids differ from amorphous solids in that crystalline solids have _
2、.A) appreciable intermolecular attractive forces B) a long-range repeating pattern of atoms, molecules, or ions C) atoms, molecules, or ions that are close together D) much larger atoms, molecules, or ions E) no orderly structure3) An alloy is a _.A) heterogeneous mixture of two metals. B) pure meta
3、l. C) metallic material that is composed of two or more elements. D) nonmetal with some properties of a metal. E) mineral containing two or more metals.4) What is the typical effect of the addition of an interstitial element on the properties of a metal?A) increase in malleability and corrosion resi
4、stance B) increase in hardness and strength, decrease in ductility C) decrease in melting point and increase in ductility D) decrease in conductivity and increase in brittleness E) increased surface luster5) The properties of graphene include _.A) high strength B) low thermal conductivity C) a zero
5、energy gap D) A and C E) A, B and C6) The _ lattice is one of the seven primitive three-dimensional lattices in which the relationship between the lattice vectors a, b, and c can be written as: a b cA) monoclinic B) hexagonal C) rhombohedral D) tetragonal E) cubic7) Gallium crystallizes in a primiti
6、ve cubic unit cell. The length of the unit cell edge is 3.70 . The radius of a Ga atom is _ .A) 7.40 B) 3.70 C) 1.85 D) 0.930 E) Insufficient data is given.8) CsCl crystallizes in a unit cell that contains a Cs+ion at the center of a cube and a Cl-ion at each corner. The unit cell of CsCl is _.A) cl
7、ose packed B) body-centered cubic C) face-centered cubic D) amorphous E) primitive cubic9) The formation of a condensation polymer generally involves _.A) the addition of a plasticizer B) the mixing of sulfur with an addition polymer C) the elimination of a small molecule D) the vaporization of a plasticizer E) the formation of significant crosslinking10) Inorganic compounds that are semiconductors have an average of_ valence electrons.A) 1 B) 2 C) 3 D) 4 E) 5Answers：01-05：DBCBD 06-10：ACBCD
