Periodic Trends
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12 Terms
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Atomic Radius
Measures the size of an atom from the nucleus' center to the valence electron
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Atomic radius decreases
Across a period
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Atomic radius increases
Down a group
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Ionic Radius
Measures the size of atoms after they gain/lose electrons
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Positive Ions
-Losing ions
-Radius decreases
-Radius decreases
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Negative Ions
-Gaining electrons
-Radius increases
-Repulsion between extra electrons increases
-Radius increases
-Repulsion between extra electrons increases
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Electronegativity
An atoms attraction for electrons
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Electronegativity decreases
Down a group
-more likely to lose electrons
-electrons are loosely held
-more likely to lose electrons
-electrons are loosely held
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Electronegativity Increases
Across a period
-Atoms are held tightly
-think of the noble gasses where it's difficult to remove their electrons
-Atoms are held tightly
-think of the noble gasses where it's difficult to remove their electrons
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Ionization Energy
Amount of energy required to remove a valence electron from an atom
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Ionization energy decreases
Down a group
-valence electron is farther away and easier to remove
-valence electron is farther away and easier to remove
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Ionization energy increases
Across a period
-valence electron is held higher
-valence electron is held higher