Coordination Numbers and Ligancy Quiz
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Questions and Answers

Which term is used to describe the number of atoms, molecules or ions bonded to a central atom in a molecule or crystal?

  • Coordination number (correct)
  • Ligancy
  • Hexacoordinate
  • Polyatomic ion

    • Who originally defined the concept of coordination number in 1893?

  • Alfred Kinsey
  • Alfred Nobel
  • Alfred Wegener
  • Alfred Werner (correct)

    • How is the coordination number determined for molecules and polyatomic ions?

  • By counting the number of neighboring atoms
  • By counting the number of ligands
  • By counting the total number of atoms in the molecule or ion
  • By counting the number of bonds formed by the central atom (correct)

    • What is the coordination number of the central cation in [Cr(NH3)2Cl2Br2]−?

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    Which coordination number is commonly observed in molecules and crystals?

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