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Copper crystallizes in a face-centered cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?

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Copper crystallizes in a face-centered cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm? 

(1) 108 

(2) 128 

(3) 157 

(4) 181 

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1 Answer

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Best answer

In fcc, face diagonal = 4r. Therefore,

Hence, the correct option is (2).

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