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9 23 09

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class notes from chemistry 9-23-09

class notes from chemistry 9-23-09

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Transcript

  • 1. Introduction to Chapter 5 Naming Compounds
    9/23/09
  • 2.
  • 3.
  • 4. Two Types of Compounds
    Type 1 Molecular compounds
    Made by joining nonmetal atoms together into molecules.
    Type 2 Ionic compounds
    Made by combining two ions.
    Cation and an anion. +/-
    Metals and Nonmetals
  • 5. Two Types of Compounds
    • Ionic Compounds (cont.)
    The electrons lost by the cation are gained by the anion
    The cation and anions surround each other
    Smallest piece is a FORMULA UNIT
  • 6. Chemical Formulas
    Shows the kind and number of atoms in the smallest piece of a substance
    Molecular formula- number and kinds of atoms in a molecule
    CO2
    C6H12O6
  • 7. Formula Unit
    The smallest whole number ratio of atoms in an ionic compound
    Ions surround each other so you can’t say which is hooked to which
  • 8. Charges on ions
    For most of the Group A elements, the Periodic Table can tell what kind of ion they will form from their location
    Elements in the same group have similar properties
    Including the charge when they are ions
  • 9.
  • 10. What about the others?
    What about the transition metals
    They can form more than one type of ion
    We have to figure those out some other way
    More on this later
  • 11. Naming ions
    We will use the systematic way
    Cation- if the charge is always the same (Group A) just write the name of the metal.
    Na+1Sodium
    Ca+2Calcium
    Al+3Aluminum
    Li+1 Lithium
  • 12. Write Formulas for these
    Potassium ion
    Magnesium ion
    Calcium ion
    Cesium ion
    Barium ion
    Hydrogen ion
  • 13. Naming Anions
    Anions are always the same
    Change the element ending to -ide
    F-1 Fluorine
  • 14. Naming Anions
    Anions are always the same
    Change the element ending to -ide
    F-1 Fluoride
  • 15. Name these
    Cl-1
    N-3
    Br-1
    O-2
    I-
    Chloride
    Nitride
    Bromide
    Oxide
    Iodide
  • 16. Write these
    Sulfide ion
    iodide ion
    phosphide ion
    Strontium ion