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CAIE A-Level Chemistry 3.5.1 Molecular Shapes and Bond Angles

Practise deriving the specified molecular shapes and angles from electron-pair repulsion around a central atom.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • count bonding regions and lone pairs around the central atom, treating multiple bonds as one region
  • minimize repulsion and use lone-pair–lone-pair greater than lone-pair–bond-pair greater than bond-pair repulsion
  • recall the specified linear, trigonal planar, tetrahedral, pyramidal, bent, bipyramidal and octahedral cases

3.5.1—The shapes of, and bond angles in, molecules question 1

[Maximum number: 1]

Sulfides are compounds that contain sulfur but not oxygen.

Carbon disulfide, CS2\mathrm{CS}_{2}, is a volatile liquid at room temperature and pressure.

Suggest the bond angle in a molecule of CS2\mathrm{CS}_{2}.

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