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20 Cards in this Set
- Front
- Back
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Element |
Elementary substance that can't be broken down by chemical means to a simpler substance. |
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Smallest single unit of an element which retains its properties |
Atom |
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Compound |
Two or more elements chemically combined. |
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Molecule |
Smallest uncharged individual unit of a compound/element formed by the union of two or more atoms. |
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Ion |
Charged atom/group of atoms |
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Cation |
+ |
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Anion |
- |
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Ionic compound forces |
between anions and cations |
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Covalent |
Shared electrons Two nonmetals |
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Sigma bond |
Where orbitals overlap along a line connecting the atom. |
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Sigma bond |
(><) + (><) ===== (><0><) |
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Polarity of two atoms of the same element? |
Always nonpolar |
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Coordinate bond |
Covalent bond where both electrons come from the same atom. Carbon Monoxide |
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Metal |
Element who's atoms lose electrons easily |
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4 types of intermolecular bonding |
1. Dipole - Dipole 2. Hydrogen 3. Van der Waals bonds 4. Cation-pi interactions. |
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Dipole - Dipole |
Large electronegativity between bonded atoms. |
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Dipole |
Pair of permanent partial charges. |
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Hydrogen bond |
Between Hydrogen and Nitrogen, Oxygen or Flourine. Electronegativity between atom and hydrogen lead to partial charges. Strong intermolecular forces. |
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Van der Waals bond |
Weak. Slight imbalance between two atoms or groups of atoms which otherwise have electrical neutrality. |
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Cation - Pi Bonds |
Localized negative charge of pi orbital electrons located above and below the aromatic ring in the molecule. |
