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29 Cards in this Set
- Front
- Back
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Ionization Energy |
Required to remove an electron from a gaseous atom |
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Group trend |
Goes Down the periodic table Ionization energy decreases down a group due to valence electrons being further from the nucleus. |
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Period trend |
Goes across the periodic table Ionization energy increases as you move across a period due to an increased effective nuclear charge |
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It requires more energy to… |
Remove a second or third electron because they are more attracted to a positive ion than a neutral atom |
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First ionization energy |
Energy required to remove the 1st electron |
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2nd ionization energy |
Energy required to remove the 2nd electron |
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3rd ionization energy |
Energy required to remove the 3rd electron |
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There is a large increase of ionization energy whenever an electron is removed from an atom/ion that is.. |
Isoelectronic with a noble gas Because the electron being removed is a core electron |
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Cations are always.. |
Smaller than the neutral atom from which they are made |
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Anions are always.. |
Bigger than the neutral atom from which they are made |
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Decreased distance= |
More attraction |
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The more electrons lost… |
The smaller the ion becomes |
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The more electrons gained… |
The bigger the atom becomes |
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The more electron repulsions (space between the electrons).. |
Results in less attractive force between the nucleus and energy levels |
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Electronegativity |
Tendency for an element to attract electrons when chemically combined with another element |
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What is Flurorine’s electronegativity? |
4.0 (The highest) |
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Group trend |
Electronegativity decreases moving down |
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Electrons are less attracted to the nucleus when… |
There are more energy levels |
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Period trend |
Electronegativity increases moving left to right across a period |
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A vertical column in the periodic table: |
A group |
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The periodic table was first arranged by the scientist.. |
Mendeleev |
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The elements in the periodic table are arranged in order of increasing… |
Atomic number |
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Group one is also known as |
Alkaline metals |
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The two rows on the bottom of the periodic table are also known as |
F block |
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D block elements are also known as |
Transition elements |
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As you move across a period from left to right the size of an atom Will |
Decrease |
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As you move down a group the size of the atoms will |
Increase |
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Ionization energy will increase as you move |
Across |
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Ionization energy will decrease as you move |
Down |
