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AP EAMCET202018 Sep 2020Morning ShiftChemistrySolid StateActual

Calculate the coordination number of ( Na ⁺ )in ( NaCl ) crystal, given radius of ( Na ⁺ )and ( Cl ⁻ )are (95 pm ) and (181 pm ) respectively.

Options

  1. A8
  2. B4
  3. C6
  4. D12

Correct answer

C. 6

Step-by-step solution

For ( NaCl ) crystal Radius ratio, ( r_ Na ⁺ r_ Cl ⁻ = 95 181 =0.5248 ), which is, in the range of (0.414-0.732 ). So, coordination number of ( Na ⁺ )in ( NaCl ) crystal (=6 )

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