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25 Cards in this Set
- Front
- Back
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Define Intramolecular forces
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forces within the molecule
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list the types of intramolecular forces
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Ionic, covalent, and metallic
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What is the strongest intramolecular force?
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Ionic
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What is the weakest intramolecular force?
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covalent
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What can intramolecular forces tell us?
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properties
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Define intermolecular forces.
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forces between multiple molecules
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list the types of intermolecular forces.
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1) dipole-dipole
2) hydrogen bond 3) London dispersion (aka van der Waals) |
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Strongests intermolecular force?
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dipole-dipole
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weakest intermolecular force?
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van derWaals
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What can Intermolecular forces tell us?
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they can help us determine the state of the matter the substance will be
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define dipole-dipole forces
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foreces that occure between 2 or more neutral, polar molecules
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how are molecules with dipole-dipole force oriented?
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the postive end and the negative end are close to each other and the force is between them
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What influences the strength of a dipole-dipole force?
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1) attraction of unlike charges
2)polarity (direcy relationship) |
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Molecules held together by dipole-dipole forces tend to occur between molecules that form into what state of matter?
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solids
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Hydrogen bondings is a unique case of _______.
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dipole-dipole forces.
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Define hydrogen bonding.
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a force that occurs between hyrdogen in 1 molecule and a highly electronegative atom in another.
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hydrogen bonds most commonly form between hydrogen and _____, _____, or ____.
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oxygen, nitrogen, or flourine
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define London Dispersion force
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forces that occur in everything due to the constant motion of e- compounds
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how strong are london dispersion forces?
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relatively weak
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london dispersion forces are caused by a phenonomenon knowns as ______.
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Instantaneious dipole formation
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what is polarizability
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ease of making a substance polar
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strength of London dispersion force ______ down a group
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increase
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polarizability _______ down a group
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increases
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Anions have what charge?
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negative
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Cations have what charge?
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positive
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