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Atomic Number and Mass Number

What is the e...

Question

What is the effective number of atoms present in the given unit cell

A

2

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B

4

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C

3

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D

5

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Solution

The correct option is B 4
The given unit cell is FCC.
For FCC unit cell $Z_{e f f} = 8 \times \frac{1}{8} + 6 \times \frac{1}{2} = 4$

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