Copper crystallizes in a face-centered cubic lattice with a unit cell length of 361pm. What is the radius of copper atoms in pm?
A
157
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B
181
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C
108
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D
128
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Solution
The correct option is D128 Since Cu crystallizes in a face-centered cubic lattice,
Atomic radius, r=a2√2
Where, a = Edge length = 361 pm r=3612√2 =127.6≈128pm