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Homework

Homework. Chapter 2 Read pages 43-44 WS: Naming molecules Webassign Unit 3 Due Wednesday 1/23 at 10 pm Test Review Due on test day in class! Test Dates: Jan. 24 or 25. Acid Worksheet 1. perchloric acid 2. HI 3. phosphoric acid 4. H 2 CO 3 5. hydrocyanic acid 6. HClO 7. HNO 3

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Homework

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  1. Homework • Chapter 2 Read pages 43-44 • WS: Naming molecules • Webassign Unit 3 Due Wednesday 1/23 at 10 pm • Test Review Due on test day in class! • Test Dates: Jan. 24 or 25

  2. Acid Worksheet 1. perchloric acid 2. HI 3. phosphoric acid 4. H2CO3 5. hydrocyanic acid 6. HClO 7. HNO3 8. hydrochloric acid 9. H3PO3 10. HClO2 11. nitrous acid 12. HBr 13. HC2H3O2 14. H2CrO4 15. dichromic acid 16. permanganic acid 17. H2SO4 18. HClO4 19. H2C2O4

  3. BINARY MOLECULAR COMPOUNDS • composed of nonmetals • electrons are shared (covalent): NO CHARGES • no criss-cross method • do not reduce subscripts • can combine in more than one way

  4. NAMING BINARY MOLECULES • prefixes used to denote multiple atoms of one element in a molecule 1 mono- 6 hexa- 2 di- 7 hepta- 3 tri- 8 octa- 4 tetra- 9 nona- 5 penta- 10 deca-

  5. NAMING BINARY MOLECULES • 2nd element in name ends in –ide • for oxides: generally for mono, use only one “o” • monooxide becomes monoxide

  6. NAMING BINARY MOLECULES • if there is ONE atom of the first element, omit the prefix mono– • ex: CO carbon monoxide NOT monocarbon monooxide

  7. NAMING BINARY MOLECULES CO carbon monoxide CO2 carbon dioxide N2O dinitrogen monoxide Cl2O8 dichlorine octaoxide

  8. WRITING NAMES OF2 oxygen difluoride N2O5 dinitrogen pentaoxide P4O10 tetraphosphorus decaoxide SO3 sulfur trioxide

  9. WRITING FORMULAS nitrogen trifluoride NF3 disulfur dichloride S2Cl2 dinitrogen tetraoxide N2O4 carbon tetrachloride CCl4

  10. MOLECULAR FORMULA • diatomic molecules: molecules with 2 atoms of the same element • there are 7 – know them! N2 O2 H2 Cl2 I2 F2 Br2 or Br2 I2 N2 Cl2 H2 O2 F2

  11. Electronegativity and Polarity • Electronegativity= ability of an atom to attract electrons in a covalent bond. • Most electronegative element = • Least electronegative element = • Unequal sharing of electrons will produce a polar bond.

  12. Examples

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