Question

The number of carbon atoms per unit cell of diamond unit cell is (a) 6 (b) 1 (c) a (d) 8

Answer 1

Image result for The number of carbon atoms per unit cell of diamond unit cell is (a) 6 (b) 1 (c) a (d) 8

No.of atoms present in a diamond cubic unit cell is 1 + 3 + 4 = 8. Since each carbon atom is surrounded by four more carbon atoms, the co-ordination number is 4.