If the length of the unit cell is 5ËšA, the smallest distance in ËšA between the two neighbouring metal atoms in a face centred cubic lattice is:
A
250
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B
5
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C
7.07
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D
3.535
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Solution
The correct option is B 3.535 If the length of the unit cell is 5A˚, the smallest distance in A˚ between the two neighbouring metal atoms in a face centred cubic lattice is a√2=5√2=3.535Ao