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Periodic Trends
Chapter 5 semester 1
8
Chemistry
10th Grade
01/03/2009

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Term
Atomic Radius:define
Definition
Size of an atom, from the nucleus to outermost stable electron.
Term
Atomic Radius:Across
Definition
Decreases as you go across, because the pull from the protons pulls in the electrons closer making it smaller.
Term
Atomic Radius:Down
Definition
Increases, because you add more electron orbits so it is obviously getting bigger.
Term
Ionization Energy:Define
Definition
The Energy required to remove an electron from an atom
Term
Ionization Energy:Across
Definition
Increases as you go across, because obviously it's harder to take away for example 10 electrons than just remove 1.
Term
Ionization Energy:Down
Definition
Decreases, because it's farther away from the nucleus anyways so it's easier.
Term
Electronegativity:Define
Definition
Tendancy and ability of an atom to attract other electrons to share.
Term
Electronegativity:Across+Down
Definition
Flourine is the most electronegative element so think of it as everything going to that one. It would increase as going across and then increase going up to flourine.
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