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Question

The atomic radius of metal crystallizing in fcc structure true is 1.25Ao. Hence the volume occupied by atoms in cell crystal is:

A
4.078×1022cm3
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B
6.09×1023cm3
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C
3.27×1023cm3
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D
2.68×1022cm3
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Solution

The correct option is A 4.078×1022cm3
For FCC unit cell
4r=2×a or a=22×r=3.5Ao
Volume =a3=(3.5×1010)3=4.078×1022cm3

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