c: unit 2, topic 1 - Intermolecular forces and gases

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4 Terms

1
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what does VSEPR theory stand for, and what does it state

valence shell electron pair repulsion

  • states that electron pairs around a central atom repel each other, arranging themselves as far apart as possible in 3D space

    • minimises repulsion and determines the shape of the molecule

2
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bonding electron pairs

  • shared between atoms

3
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non-bonding (lone) pairs

  • take up more space

  • affect molecular shape and bond angles

4
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what are electron domains, and what are the two types

RG

  • region: any region around a central atom where electrons are likely to be found

  • geometry: determine the molecular geometry

BL

  • bonding pairs of electrons

  • lone pairs (unshared pairs of electrons)

    • count as one electron domain each