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Families:
Vertical columns of elements
Periods:
Horizontal rows of elements going across Periodic Table
Neutrons in an atom:
Mass # - Atomic # (number of p
+
) = n
0
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.
Valence Electrons:
Number of electrons on farthest out orbital
Family # = ?
Number of valence electrons
Period # = ?
Number of energy levels
Atomic radius:
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
Ionization Energy:
Energy required to remove an electron from an atom
Patterns of Ionization Energy
Increases
as you move
left to right
in a period,
decrease
s as you move
down
a family.
Less pull on electrons
Electronegativity:
Measure of ability of an atom to gain electrons
Patterns of Electronegativity:
Increases
as you move
left to right
on a period,
decrease
s as you move
down
a family
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Author
Anonymous
ID
41123
Card Set
Patterns
Description
.
Updated
2010-10-10T19:51:23Z
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