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The co-ordination number of FCC structure for metals is 12, since:A. Each atom touches 4 others in same layer, 3 in layer above and 3 in layer belowB. Each atom touches 4 others in same layer, 4 in layer above and 4 in layer belowC. Each atom touches 6 others in same layer, 3 in layer above and 3 in layer belowD. Each atom touches 3 others in same layer, 3 in layer above and 3 in layer below

Answer» Correct Answer - B,C
From FCC unit cell


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