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r N a + = 195 p m and r C l - = 281 p m in N a C l (rock salt) structure. What is the shortest distance between N a + ions?

Options

  1. A778.3 p m
  2. B673.06 p m
  3. C195.7 p m
  4. D390.3 p m

Correct answer

B. 673.06 p m

Step-by-step solution

The shortest distance between two N a + i o n = 1 2 f a c e - d i a g o n a l = 1 2 × 2 2 r N a + + r c r = 2 ( 195 + 281 ) p m = 673.06 p m

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