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JIPMER 2012
Exam
JIPMER
Year
2012
Subject
Chemistry
Chapter
Solid State

JIPMER 2012 · Chemistry · Solid State

The number of atoms contained in a fcc unit cell of a monoatomic...

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 =8×18=1=8 \times \frac{1}{8}=1 ( ∵\because Each corner is shared with 8 other unit cells) The number of face atoms =6×12=3=6 \times \frac{1}{2}=3 Thus, the total number of atoms per unit cell =1+3=4=1+3=4
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