43. The efficiency with which a 3-D arrangement of identical spheres (atoms) on a
face-centered cubic lattice can pack is:
(a) 44%
(b) 54%
(c) 64%
(d) 74%
44. The efficiency with which a 3-D arrangement of identical spheres (atoms) on a
simple hexagonal lattice can pack is:
(a) 60.7%
(b) 70.7%
(c) 80.7%
(d) 90.7%
45. The efficiency with which a 3-D arrangement of identical spheres (atoms) on a
hexagonal close-packed (hcp) lattice can pack is:
(a) 64%
(b) 74%
(c) 84%
(d) 94%
Answers
1. (a)
2. (b)
3. (c)
4. (d)
5. (a)
6. (b)
7. (c)
8. (d)
9. (a)
10. (b)
11. (d)
12. (a)
13. (c)
14. (b)
15. (c)
16. (d)
17. (a)
18. (b)
19. (c)
20. (d)
21. (a)
3.6 Packing Efficiency
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