Patterns

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Author:
Anonymous
ID:
41123
Filename:
Patterns
Updated:
2010-10-10 15:51:23
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patterns
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  1. Families:
    Vertical columns of elements
  2. Periods:
    Horizontal rows of elements going across Periodic Table
  3. Neutrons in an atom:
    Mass # - Atomic # (number of p+) = n0
  4. Energy level:
    • Circles around nucleus. First holds 2 electrons, then each hold 8. Fill up each one by going around clockwise until there are 8.
  5. Valence Electrons:
    Number of electrons on farthest out orbital
  6. Family # = ?
    Number of valence electrons
  7. Period # = ?
    Number of energy levels
  8. Atomic radius:
    Decreases moving left to right in a period, increases moving down a family.
  9. What causes the pattern of atomic radius?
    More attraction between electrons (which increase) and protons
  10. Ionization Energy:
    Energy required to remove an electron from an atom
  11. Patterns of Ionization Energy
    Increases as you move left to right in a period, decreases as you move down a family.

    Less pull on electrons
  12. Electronegativity:
    Measure of ability of an atom to gain electrons
  13. Patterns of Electronegativity:
    Increases as you move left to right on a period, decreases as you move down a family

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