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12 Cards in this Set
- Front
- Back
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Intramolecular bond
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Bond occurring between atoms within molecules
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Electronegativity
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Measure of the tendency of an atom to attract a bonding pair of electrons
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Covalent bond
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Sharing of at least one pair of electrons by two atoms
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Polar covalent
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UNEQUAL sharing of electrons leading to the formation of a dipole (as a result of EN difference)
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Non-polar covalent
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a.k.a. pure covalent EQUAL sharing of electrons |
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Ionic bond
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Transfer of electrons and subsequent electrostatic attraction
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Metallic bond
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Between a positive kernel and a sea of delocalised electrons
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Cause of high boiling and melting points of giant structures |
High melting and boiling points are due to strong covalent bonds being broken. E.g. diamond, graphite, silicon dioxide |
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What determines boiling and melting points of simple molecular structures? |
The strength and the relative number of intermolecular forces |
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What determines the melting and boiling points of giant ionic solids? |
Melting and boiling points determined by electrostatic forces of attraction (ionic bonds) between the cations and anions in the lattice structure |
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Van der Waals forces |
-ion-dipole -dipole-dipole > hydrogen bond - London (induced dipole) |
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Intermolecular force
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Weak force of attraction between molecules or between atoms of noble gases
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