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Worksheet: Molecular Geometries

Q1:

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

  • A N H 4 +
  • B P O 4 3
  • C [ C o C l ] 4 2
  • D [ P t C l ] 4 2
  • E C C l 4

Q2:

Nitrogen and phosphorus atoms can both form bonds with three fluorine atoms. However, only phosphorus atoms can form bonds with five fluorine atoms.

Which term best describes the bonding geometry in N F 3 and P F 3 ?

  • ABent
  • BTetrahedral
  • CTrigonal bipyramidal
  • DTrigonal pyramidal
  • ET-shaped

Which term best describes the bonding geometry in P F 5 ?

  • ATrigonal bipyramidal
  • BOctahedral
  • CPentagonal planar
  • DSquare pyramidal
  • ETetrahedral

Why is it not possible for N F 5 to form?

  • AThe lone pair in N F 3 is more stable than two additional N F bonds.
  • BThere is insufficient space around the N atom for five N F bonds to form.
  • COnly the P atom possesses valence d orbitals.
  • DOnly the P atom contains d electrons in its valence shell.
  • EThe high electronegativity of the N atom prevents sharing of electron density in five N F bonds.

Q3:

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

  • A B e H 2
  • B H C N
  • C C O 2
  • D S O 2
  • E N O 2