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Name:____________________________________________________ Period:______ Unit 1 Homework Packet Chapter 2: All Sections Chapter 4: Section 2 Chapter 6: Sections 1 and 2 Chapter 9: All Sections Enduring Understandings: Students will understand that proper lab safety and techniques leads to accurate and precise lab data and personal well being for all involved. Students will understand that chemistry lab work requires the scientific method as a problem solving technique. The student will understand that the exchange of electrons result in predictable chemical formulas. The student will understand that predicable chemical formulas allow for a universal nomenclature system. (IUPAC) Student will understand that ionic and molecular nomenclature depends on the organization of the periodic table. Book Questions: Chapter 2: Chapter 4: Chapter 6: Chapter 9: 21, 24, 30, 31, 34, 44, 54, 56, 60-63, 77 22, 24, 25, 31, 41, 46, 59 48 No book Problems Periodic Table Puzzle I F G B C E J D Place the letter of each of the above elements next to its description below. 1. An alkali metal _____ 2. An alkaline earth metal _____ 3. An inactive gas _____ 4. An active nonmetal _____ 5. A semi-metal _____ 6. An inner transition element _____ 7. Its most common charge is –2 _____ 8. A metal that can have multiple charges _____ 9. Metal with a common charge of +3 _____ 10. Typically has a charge of +1 _____ H A Parts of the Atom Element Name Atomic Number Positive Number of Number of Charge on Protons Electrons the Nucleus Carbon Neon Mass Number 12 10 Hydrogen 10 1 1 Lithium 3 Helium 2 4 4 Calcium Sodium Argon Bismuth Thorium Number of Neutrons 20 11 23 18 22 83 209 90 142 Chemical Symbol Chemical Symbols Mass # Charge 15 7 N 3 Atomic # Element/Ion 1 1 H 1 1 H 12 6 C 7 3 Li Cl 35 17 39 19 K 24 12 Mg 2 75 33 As 3 107 47 Ag 107 47 Ag 32 16 S 2 231 92 U Mass # = protons + neutron Atomic # = protons Charge = the overall charge on the atom when the number of electrons change This chemical symbol represents Nitrogen-15. This means that this nitrogen atom has 7 protons based on the atomic number. Because the mass number is the number of protons and neutrons and we already know that it has 7 protons based on the atomic #, there are 8 neutrons. Noticing that it has a charge of +3, the nitrogen atom has three fewer electrons to give it the +3 charge. That means that this nitrogen atom has 4 electrons. Atomic Number Atomic Mass Mass Number Protons Neutrons Electrons Writing Ionic Chemical Formulas (Criss-Cross Method) Write the formulas of the compounds produced from the listed ions. Cl- S-2 P-3 Na+ Zn+2 Fe+3 Write the formulas of the compounds produced from the listed ions. OH- K+ NH4+ Ca+2 Fe+3 SO4-2 PO4-3 Write the formulas of the compounds produced from the listed ions. Br- NH4+ H+ Mg+2 Al+3 Co+3 CO3-2 CN- AsO4-3 Cr2O7-2 Naming Ionic Compounds 1. CaCO3 =_______________ 1. sodium bromide =_________________ 2. KCl =_______________ 2. silver (I) chloride =_________________ 3. FeSO4 =_______________ 3. ammonium hydroxide =_________________ 4. LiBr =_______________ 4. lithium chromate =_________________ 5. MgCl2 =_______________ 5. nickel (II) bromide =_________________ 6. FeCl3 =_______________ 6. germanium(IV) phosphate =_________________ 7. Zn3(PO4)2 =_______________ 7. scandium (I) chloride =_________________ 8. NH4NO3 =_______________ 8. lead (II) iodine =_________________ 9. Al(OH)3 =_______________ 9. chromium (II) bromide =_________________ 10. CuC2H3O2 =_______________ 10. manganese (II) oxide =_________________ 11. PbSO3 =_______________ 11. zinc (II) sulfide =_________________ 12. NaClO3 =_______________ 12. iron(III)hexafluorosilicate =_________________ 13. CaC2O4 =_______________ 13. hydrogen chloride =_________________ 14. Fe2O3 =_______________ 14. sodium chloride =_________________ 15. (NH4)3PO4 =_______________ 15. cerium (II) bromide =_________________ 16. NaHSO4 =_______________ 16. silver (I) peroxide =_________________ 17. Hg2Cl2 =_______________ 17. copper (I) nitride =_________________ 18. Mg(NO2)2 =_______________ 18. magnesium acetate =_________________ 19. CuSO4 =_______________ 19. hydrogen iodide =_________________ 20. NaHCO3 =_______________ 20. barium nitrate =_________________ 21. NiBr3 =_______________ 21. arsenic (III) carbonate =_________________ 22. Be(NO3)2 =_______________ 22. Thorium (II) nitrate =_________________ 23. ZnSO4 =_______________ 23. mercury (II) phosphate =_________________ 24. AuCl3 =_______________ 24. cerium (II) oxide =_________________ 25. KMnO4 =_______________ 25. nickel (II) carbonate =_________________ Naming Molecular (Covalent) Compounds Name the following covalent compounds. 1. CO2 ____________________________ 2. CO ____________________________ 3. SO2 ____________________________ 4. SO3 ____________________________ 5. N2O ____________________________ 6. NO ____________________________ 7. N2O3 ____________________________ 8. NO2 ____________________________ 9. N2O4 ____________________________ 10. N2O5 ____________________________ 11. PCI3 ____________________________ 12. PCI5 ____________________________ 13. NH3 ____________________________ 14. SCI6 ____________________________ 15. P2O5 ____________________________ 16. CCI4 ____________________________ 17. SiO2 ____________________________ 18. CS2 ____________________________ 19. OF2 ____________________________ 20. PBr3 ____________________________ More Practice of Chemical Names and Formulas Write the chemical formula for the following compounds. Name Formula Name Sodium Fluoride Potassium Dichromate Iron (II) Oxide Calcium Carbonate Sulfur Trioxide Barium Nitrate Aluminum Fluoride Calcium Phosphate Lithium Nitrite Sodium Hydroxide Diphosphorus Trioxide Copper (II) Sulfate Ammonium Hydroxide Iron (III) Oxide Potassium Nitride Disulfur Dichloride Magnesium Oxide Tin (IV) Fluoride Iron (II) Hypochlorite Ammonium Chloride Silver (I) Oxide Sodium Carbonate Dinitrogen Trioxide Mercury (II) Sulfide Formula Write the name of the following chemical compounds. Formula Name Formula KCIO3 KI CO2 PbS2 AgI Cu2O Fe(OH)2 Na2CO3 H2SO3 AI2S3 CuCN FeCrO4 Na2SO4 ICI3 CrF2 CuSO4 (NH4)2SO4 H3PO4 N2O4 CoF3 CaCI2 Pb(NO3)2 ZnO Na3N KCIO Fe2O3 HCI PBr5 S2CI2 CuBr2 Name