Physical States and Properties Properties of Solids: The influence of crystal structure on behavior by Rachel Bernstein, Ph.D., Anthony Carpi, Ph.D. Reading Quiz Teach with this 1. In amorphous solids, the atoms or molecules are held together in a completely random formation. true false 2. Which of the following is true of solids? Solids maintain a defined shape and size under all conditions. All solids have a crystalline structure. All solids maintain a defined shape and size if conditions remain constant. All solids have a lattice structure at the atomic level. 3. One major difference between crystalline and amorphous solids is that crystalline solids have a precise melting point. amorphous solids have a lattice structure. crystalline solids break unpredictably and can produce curved fragments. amorphous solids always behave consistently and uniformly. 4. A friend in your chemistry class is struggling to understand why crystalline solids are grouped into four main types: network, molecular, ionic, and metallic. Which explanation below will BEST help him begin to understand why chemists might have these groups? Crystalline solids all share a lattice structure, but have different densities. Chemists use the groups to organize the solids by density. Crystalline solids all share a lattice structure and the same types of bonds, but are composed of different elements. These elements affect the way the solid conducts heat and electricity. Crystalline solids all share a lattice structure, but behave differently under similar conditions. Crystalline solids all share a lattice structure, but the bonds that hold them together at the atomic level differ. The elements that make up the solids also differ. These differences affect how a solid conducts heat and electricity, its density, and 5. Solids have many different properties. ___________ solids are known for their ability to be flattened into a sheet, stretched into a wire, and to conduct energy well. Molecular Metallic Network Ionic 6. It is possible to tell the difference between a solid with a crystalline structure and one with an amorphous structure just by looking at it. true false 7. An engineer is designing an electrical system and is looking for a material to transmit energy. She has four solids available, each made with different materials. To conduct energy most efficiently and effectively, she should use material whose electrons are held with ionic bonds. whose electrons are held with covalent bonds. whose electrons are held with metallic bonds. that is an electrical insulator. 8. Which statement is true about the properties of solids? Metallic solids have a high melting point. Network solids are generally not soluble in water. Molecular solids do not dissolve easily in water. All ionic solids are similar in density. Score Quiz
