General Solids Past Paper PDF

Name ________________________ Date ___________ Period _______ #4 General Solids: 1. What type of bond holds the ions together i...

Name ________________________ Date ___________ Period _______ #4 General Solids: 1. What type of bond holds the ions together in an ionic crystal? a. covalent b. molecular c. electrostatic 2. The characteristic that would best identify an ionic crystal is: a. low melting point b. hard and unbreakable c. conducts electricity when dissolved in water d. dissolves in nonpolar solvents 3. At the lattice points of an ionic crystal are: a. molecules b. atoms c. ions d. bonds 4. T F a. ionic compounds conducts electricity in the solids state. T F b. ionic crystals easily cleave along a plane because of electrostatic repulsion. T F c. ionic crystals are usually liquids at room temperature 5. Fill In the Following Chart: Molecule Electron dot pattern (if you need) Polarity Type of Crystalline Solid HBr CO2 NH3 HOH SiO2 CH4 Fe Cl2 NaCl 6. The following are properties of all metals except: a. conduct electricity b. can be hammered into sheets c. shine when polished d. conduct heat e. are solids at room temp 7. Which one of the following would have metallic bonds? a. HOH b. Si c. Na d. NaCl e. Cl2 8. Which of the following are properties of all metals and help determine it to be a metal? a. have a high melting point b. dissolve in water c. reflect light d. conduct electricity in the solid state 9. Classify as: ionic crystal, molecular, network covalent crystal, large carbon chain, LCC, or metallic. ________________Material is composed of positive kernels surrounded by a sea of electrons. ________________Material is composed of atoms bonded covalently to neighboring atoms ________________Material is a good conductor of heat and electricity in the solid phase. ________________ Material is not a conductor, but can be used for most all solubility. ________________Material is not workable, very hard, and a poor conductor of electricity. ________________Material is very volatile (evaporates easily) 10. Circle the one in each of the following pairs that would have a higher melting point and explain why. a. HOH or diamonds __________________________________________________ b. HOH or H2 __________________________________________________ c. Fe or Br2 __________________________________________________ d. NH3 or NaCl __________________________________________________ e. CO2 or graphite __________________________________________________ 11. Types of Crystalline solids and Their Properties…diatomic molecules DO NOT dissolve at all Substance: BaCl2 SiC H2 Ag C8H14 C6H9OH Type of _______________________________________________________________________ Crystal ________________________________________________________________________ Substance Melting Boiling Solubility in Solubility in Conductivity Conductivity point C Point C water benzene as solid in water -259 -253 No No No No 961 2212 No No Yes -- 925 1560 Yes No No Yes 2700 -- No No No No -57 126 No Yes No No -37 78 Yes Yes No No Substance: SiO2 C7H16 Al NaBr O2 Type of ________________________________________________________________________ Crystal ________________________________________________________________________ Substance Melting Boiling Solubility in Solubility in Conductivity Conductivity point C Point C water benzene as solid in water 755 1390 Yes No No Yes 660 2467 No No Yes -- -90.6 98.4 No Yes No No 1610 2230 No No No No.218 -182 No No No No 12. Classify as: ionic crystal, molecular crystal (covalent), network covalent crystal, LCC, or metallic. a.__________________ has a very low melting point b.__________________ diamond is an example of this type of crystal c.__________________ conducts electricity in the solid phase d.__________________ has the highest melting points of all crystal types e. __________________ is able to dissolve in all mediums 13. Arrange the following substances in order of increasing melting points: F2 SiO2 NH3 KCl Fe C5H9NH3 ___________________________________ 14. Classify the following: ionic crystal, molecular polar, molecular nonpolar, metallic, NCC, LCC ______________________a. Cr _____________________b. NaCl ______________________c. Br2 _____________________d. diamond ______________________e. NH3 _____________________f. HOH ______________________g. C3H5O _____________________h. Si 15. Explain how fluorine and chlorine as gases but bromine is a liquid and iodine is solid Crystal Type Melting point Boiling point e- conductivity e- conductivity Solubility in solid state in aqueous in water A 1535C 3000C Yes NA No B 801C 1413C No Yes Yes C -272C -268C No NA No D 1713C 2590C No NA No E 2C 105C no no yes