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Copper crystallizes in fcc with a unit cell length of 361 pm . What is the radius of copper atom ?

Options

  1. A108 pm
  2. B127 pm
  3. C157 pm
  4. D181 pm

Correct answer

B. 127 pm

Step-by-step solution

For FCC, 2 a=4 r (the atoms touches each other along the face- diagonal) aligned & r= 2 a 4 = 2 361 4 & =127 pm aligned

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