chemistry 1

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Author:
studysuccess
ID:
153517
Filename:
chemistry 1
Updated:
2012-05-12 03:27:14
Tags:
intro chemistry isotopes ionic compounds
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Description:
introduction to chemistry, atomic mass, ionic compounds
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  1. Formula for Density (D) using Mass (m) and Volume (V)
    D=m/V
  2. 10947Ag has ___ neutrons
    Zn has an atomic mass is 109, 47 protons (same as the number of the number of electrons and atomic number).

    # of neutrons=109-47=62
  3. what's an isotope?
    the difference in atomic mass changes the number of neutrons.

    The number of electrons is = to the # of protons.
  4. how is Atomic mass created?
    • percent abundance
    • (Sum the percent abundance of isotopes converted to decimal X the atomic mass of an molecule).
  5. What are ionic compounds?
    composed of ions, usually metals and non-metals, or polyatomic ions.

    combo of (metals & polyatomic ions; polyatomic ions; or metals & non-metals)
  6. define cation
    • positive ions
    • (K+,Na+)
  7. define anions
    negative ions
  8. 1+ charged ions include:
    Li, Na, K, Rb, Cs
  9. 2+ charged ions
    Be, Mg, Ca, Sr, Ba
  10. 3+ charged ions
    Al
  11. Transitions metals charge
    vary and are located in the center of the periodic table
  12. 1- charged ions
    F, Cl, Br, I
  13. 2- charged ions
    O, S
  14. charge on polyatomic elements
    must be memorized
  15. + or - ionic compounds named first
    name +ion first
  16. ending to non-polyatomic ions with negative charge
    -ide
  17. Name the following ionic compound:
    TiBr4
    Which Ti do you use:
    Ti2+
    Ti3+
    Ti4+
    • Ti4+
    • The ^ 4+ is switched to the lower right
  18. What do hydrates mean?
    tell you the # of polyatomic elements and prefix to use
  19. what prefix do you use with 1 hydrate
    mono
  20. what prefix do you use with 2 hydrate
    di
  21. what prefix do you use with 3 hydrate
    tri
  22. what prefix do you use with 4 hydrate
    tetra
  23. what prefix do you use with 5 hydrate
    penta
  24. what prefix do you use with 6 hydrate
    hexa
  25. steps to writing compounds by crossing charges
    • 1) identify ions present
    • 2) cross the charges
    • 3) divide subscript by lowest common denominator

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