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NEET2012ChemistrySolid StateActual

The number of atoms contained in a fcc unit cell of a monoatomic substance is

Options

  1. A1
  2. B2
  3. C4
  4. D6

Correct answer

C. 4

Step-by-step solution

In a fcc unit cell, the number of corner atoms =8 1 8 =1 ( Each corner is shared with 8 other unit cells) The number of face atoms =6 1 2 =3 Thus, the total number of atoms per unit cell =1+3=4

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