Molecule Shapes

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11 Terms

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AB2

Linear (180)

<p>Linear (180)</p>
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AB3

Trigonal planar (120)

<p>Trigonal planar (120)</p>
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AB4

tetrahedral (109.5)

<p>tetrahedral (109.5)</p>
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AB5

trigonal bipyramidal 90, 120

<p>trigonal bipyramidal 90, 120</p>
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AB6

Octahedral 90

<p>Octahedral 90</p>
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Dipole Moment

A measure of the amount of charge separation in a molecule

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Bond Polarity

a measure of how equally or unequally the electrons in any covalent bond are shared

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What does a dipole moment depend on?

1.The polarities of the individual bonds

2.The geometry of the molecule

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Two ways that chemical bonds can be examined

  1. How strong they are

  2. How long they are


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Bond Enthalpy

the enthalpy change, ∆H, required to break a particular bond when the substance is in the gas phase.

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Molecular Orbital Theory

Electrons occupy orbitals that extend over the entire molecule rather than belonging to just one atom.