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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Elements in the SAME GROUP have |
Similar chemical properties. Properties are not identical. |
They arent identical |
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Soft metallic solids, have low ionization energy, low density, low melting point, compounds in nature, |
Alkali Metals 1A |
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Prototypical nonmetals, "salt formers," large negative electron affinities,reacts directly w/ metals form metal halides |
Halogens 7A |
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In any atom this is attracted to the nucleus and repelled by other electrons |
Electrons |
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The force that an electron experiences depends on both factors (attraction to nucleus & repel electrons) |
Nuclear Charge |
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Defined as one-half of the distance between covalenty bonded nuclei |
The bonding atomic radius |
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Decrease from left to right across a row, Increase from top to bottom of a column |
Bonding atomic radius (size of atoms) |
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Which two periods have the same number of elements |
4 & 5 |
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Most reactive of nonmetals |
Halogens |
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Compare to alkali metals, alkaline-earth metals |
Are less reactive |
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Across a period, atomic radii |
Gradually decrease |
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Are smaller than there parent atoms, becomes this when outermost electron is removed and repulsions are reduced |
Cations |
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Larger than their parents, becomes this when electrons are added and repulsions are increased |
Anion |
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Increase size as you go down a column, |
Ions (iconic size decreases with an increasing nuclear charge) |
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Amount of energy required to remove an electron from the ground state of a gaseous atom or ion |
Ionization Energy |
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As one goes down a column how much energy is required to remove the first electron |
Less energy |
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Energy change a company addition of electron to gaseous atom |
Electron Affinity |
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Electron affinity becomes more exothermic as you go .... |
From left to right across a row |
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Measure of an atom's attraction for the shared pair of electrons in a bond |
Electronegativity |
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across a period electronegativity |
Increases |
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Down a group electronegativity |
Decreases |
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