The distance between adjacent oppositely charged ions in rubidium chloride is 328.5 pm, in potassium chloride is 313.9 pm, in sodium bromide is 298.1 pm and in potassium bromide is 329.3 pm. The dista

Question

The distance between adjacent oppositely charged ions in rubidium chloride is 328.5 pm, in potassium chloride is 313.9 pm, in sodium bromide is 298.1 pm and in potassium bromide is 329.3 pm. The distance between adjacent oppositely charged ions in rubidium bromide is

Prashant Kotian · Accepted Answer

Correct answer: D. The distance between adjacent oppositely charged ions is the sum of their ionic radii. Using additive relations: d(RbBr) = d(RbCl) + d(KBr) - d() = 328.5 + 329.3 - 313.9 = 343.9 pm.

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