Two ions A⁺ and B⁻ have radii 104 and 200 pm respectively, in a cubic close packed crystal of compound A B . The coordination number of A⁺ is

Step-by-step solution

r_ A⁺ ⁺=104 pm r_ B⁻ ⁻=200 pm Radius ratio r_ A⁺ ⁺ r_ B⁻ ⁻ = 104 200 =0.52 It lies between (0.414 to 0.732) . Coordination number of A⁺ is 6