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NEET2009ChemistrySolid StateActual

Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm , the atomic radius of the lithium will be

Options

  1. A240.8 pm
  2. B151.98 pm
  3. C75.5 pm
  4. D300.5 pm

Correct answer

B. 151.98 pm

Step-by-step solution

In case of body centred cubic (bcc) crystal, a 3 =4 r Hence, atomic radius of lithium, r = a 3 4 aligned & = 351 1.732 4 & =151.98 pm aligned

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