Asked in KMU Centralized Admission Test 2021 2021Moderate

Coordination number of an ion in:

Correct answer: A. 4

  • A. 4
  • B. 6
  • C. 8
  • D. 2

Explanation

The coordination number of an ion refers to the number of ions or atoms that surround and are bonded to the central ion in a compound. For example, if an ion has a coordination number of 4, it means that there are four other ions or atoms bonded to the central ion. The coordination number depends on the specific compound and the arrangement of ions or atoms around the central ion.

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About Shape of Ionic Crystals

Ionic crystal shape depends on the regular arrangement of oppositely charged ions in a three-dimensional lattice. The topic covers coordination number, radius ratios, lattice geometry and structures such as sodium chloride, caesium chloride and zinc sulfide, which should not be confused with the molecular shapes predicted by VSEPR theory.

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