Chemistry
Grade-8
Easy

Question

In NaCl crystal each Cl ion is surrounded by:

  1. 4Na+ ions.
  2. 6Na+ions.
  3. 1Na+ ions.
  4. 2Na+ions.

hintHint:

The number of atoms surrounding a particular atom is determined by the help of a coordination number.

The correct answer is: 6Na+ions.


    • In the NaCl crystal, each chlorine ion is surrounded by six sodium ions. 
    • Sodium chloride is an octahedral crystal. The coordination number is the number that determines that a particular atom is surrounded by how many other atoms. In the case of NaCl, the coordination number is 6. 
    • This suggests, that each chlorine ion is surrounded by 6 sodium ions and each sodium ion is surrounded by 6 chlorine ions.

    The stochiometry of NaCl crystal is 1:1.

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