Nomenclature

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Author:
Dnuorgrednu2
ID:
286781
Filename:
Nomenclature
Updated:
2014-10-28 16:15:13
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Nomenclature
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Nomenclature
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  1. Compounds
    Pure substances that are composed of 2 or more elements chemically combined in fixed proportions
  2. Covalent compounds
    Formed by 2 or more different non-metals (only)
  3. Binary covalent compounds
    Contain just 2 different NM's
  4. Inorganic covalent compounds
    No carbon
  5. Formula structure rules for covalent compounds
    • 1. More metallic NM leads formula
    • 2. # of each NM become subscripts in formula
    • 3. Names of 2 NM's are in compound name
    •      -1st element = name unchanged
    •      -2nd element = ending changed to -IDE
    • - extra rule on lab notes
  6. Ionic compounds
    Formed by chemical combination of metals with non metals in fixed proportions
  7. Metals
    Are always + because the always lose e- (cation)
  8. Nonmetals
    Are always - because they always gain e- (anion)
  9. NM Anions (monatomic)
    • Group 7A: -1 charge
    • Group 6A: -2 charge
    • Group 5A: -3 charge
    • Group 4A: -4 charge
    • Exception: Group 8A = noble gasses and they don't give or take e-
  10. Metals cations (monatomic)
    Are always + because the lose e- in ionic compounds
  11. Main group metals "A"
    • Group 1A: All +1
    • Group 2A: All +2
    • Group 3A:
    •     Al +3
    •     Ga +3
    •     In +3/+1
    •     Ti +3/+1
    • Group 4A: Sn +4/+1    Pb +4/+1
    • Group 5A: Bi +5/+3
  12. Transition Metals "B"
    • TM's that form 2 or more cation
    •     Chromium: Cr+2, Cr+3, Cr+6
    • TM's that form one cation
    •     Zn+2, Cd+2, Ag+1
    • Look at nomenclature lab for the rest 12
  13. Naming metal cations
    The names are the same as the original element names but, if a metal can form more that one cation then you use Roman numerals in parenthese.
  14. Formulas and Names of Ionic Compounds
    • - Cations lead the formula and the name
    • - COmbine cations and anions in simple whole # ratios. The rations become subscripts i the formula
    • - Prefixes never used for ionic compounds
  15. Done
    Done

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