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Vertical columns of elements
Horizontal rows of elements going across Periodic Table
Neutrons in an atom:
Mass # - Atomic # (number of p+) = n0
- Circles around nucleus. First holds 2 electrons, then each hold 8. Fill up each one by going around clockwise until there are 8.
Number of electrons on farthest out orbital
Family # = ?
Number of valence electrons
Period # = ?
Number of energy levels
Decreases moving left to right in a period, increases moving down a family.
What causes the pattern of atomic radius?
More attraction between electrons (which increase) and protons
Energy required to remove an electron from an atom
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
Measure of ability of an atom to gain electrons
Patterns of Electronegativity:
Increases as you move left to right on a period, decreases as you move down a family
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