19 in a compound

Dear Student,

Please find below the solution of your asked query:

In case of NaCl , two Cl⁻ ions present at corner of NaCl lattice and one Na⁺ ion present at edge of NaCl lattice. So, the edge length is the sum of two radius of Cl⁻ ion and two radius of Na⁺ ion as you can see in attachment.

∴ 2 × radius of Cl⁻ ion + 2 × radius of Na⁺ ion = edge length 
Given, distance between Na⁺ and Cl⁻ = x pm 
means , (radius of Na⁺ + radius of Cl⁻) = x pm 
∴ 2(radius of Na⁺ + radius of Cl⁻) = edge length 
2x pm = edge length



Hope this information clears your doubts about the topic.

Keep asking!!

Regards

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