Worksheet: Electron Pair and Molecular Geometries

In this worksheet, we will practice classifying the bond and electron pair arrangements and identifying the ideal angles of common molecular geometries.

Q1:

The bonding geometry is the same in all but one of the following molecules. In which molecule is the geometry different?

  • ANO2
  • BSO2
  • CBeH2
  • DCO2
  • EHCN

Q2:

The bonding geometry is the same in all but one of the following molecules and ions. In which species is the geometry different?

  • A[CoCl]42
  • BNH4+
  • CCCl4
  • D[PtCl]42
  • EPO43

Q3:

What is the difference between electron pair geometry and molecular geometry?

  • AMolecular geometry is concerned with the rough shape of the entire molecule, while electron pair geometry is concerned with the geometry around a single atom.
  • BElectron pair geometry accounts for outer-shell electrons as well as atoms, while molecular geometry is concerned with inner-shell electrons.
  • CElectron pair geometry accounts for lone pairs as well as atoms, while molecular geometry is concerned only with the atoms.
  • DElectron pair geometry accounts for inner-shell electrons as well as outer-shell electrons, while molecular geometry is concerned only with the atoms.
  • EMolecular geometry accounts for lone pairs as well as atoms, while electron pair geometry is concerned only with the atoms.

Q4:

Three possible arrangements of five electron pairs around an atom are shown below. Other electron pairs may be present in these molecules.

Which of the marked positions is occupied by the lone electron pair of the S atom in sulfur tetrafluoride (SF)4?

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