33. The number of atoms in the HCP unit cells is
(A) 4
(B) 6
(C) 12
(D) 17
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(b). 6
The hexagonal closest packed (hcp) has a coordination number of 12 and contains 6 atoms per unit cell. The face-centered cubic (fcc) has a coordination number of 12 and contains 4 atoms per unit cell. The body-centered cubic (bcc) has a coordination number of 8 and contains 2 atoms per unit cell.
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