49. Copper crystallizes in cubic form. If its lattice parameter, a = 3.60 Å, at.
wt. = 63.6 and density, q ¼ 8960 kg=m
3 , the number of atoms in a unit cell is:
(a) 4
(b) 3
(c) 2
(d) 1
50. Copper crystallizes in cubic form. If its lattice parameter, a = 3.60 Å, at.
wt. = 63.6 and density, q ¼ 8960 kg=m
3 , the type of unit cell is:
(a) SC
(b) BCC
(c) FCC
(d) DC
51. Sodium crystallizes in cubic form. The edge of the unit cell is 4.3 Å. The
atomic weight of sodium is 23 and its density is 963 kg=m
3 . Determine the
number of atoms in the unit cell and its type:
(a) 1
(b) 2
(c) 3
(d) 4
52. Sodium crystallizes in cubic form. The edge of the unit cell is 4.3 Å. The
atomic weight of sodium is 23 and its density is 963 kg=m
3 . Determe the
number of atoms in the unit cell and its type:
(a) SC
(b) BCC
(c) FCC
(d) DC
Answers
1. (b)
2. (c)
3. (a)
4. (d)
5. (a)
6. (b)
7. (c)
8. (d)
9. (d)
10. (a)
11. (d)
12. (a)
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9 Determination of Crystal Structure Parameters