Question

1. Based on what you know about the characteristics of solids, classify the following solids as molecular, network, ionic, or metallic. a. Cu(s) b. H2O(s) c. Quartz (SiO2) d. Graphite (Cis) e. Sugar (C12H22O11)

Answer 1

Cu is a metallic solid H2O (S) is molecular solid sio, is a network solid. Graphite Network solid or covalent network solid Sugar is molecular solid The crystalline solids are mainly four types: 1. Metallic solid. 2. Ionic solid 3. Molecular solid 4. Network solid Metallic solids have following properties: i. ii. iv. Metallic solids are malleable and ductile. They have low melting point and soft or high melting point and hard. The fun dam ental particles of these solid are atoms. They are good conductor of heat and electricity. Ionic solid have following properties: i. ii. Ionic solids are hard and brittle. They have high melting point and hard. The fun dam ental particles of these solid are cations and an ions. They are good conductor of heat and electricity in melt condition. iv. Molecular solid have following properties: i. ii. Molecular solids are show variable hardness. They have low to moderate melting point. The fundamental particles of these solid are polar molecules. They are non-conductor of heat and electricity. iv. Network solid or covalent network solid have following properties: i. ii. Network solids are very hard and sometimes brittle. They have very high melting point. The fundamental particles of these solid are atoms. They are non-conductor or semiconductor of heat and electricity. iv.