Wednesday, January 25, 2006
MULTIPLE CHOICE
1. B
2. D
3. D
4. D
5. C
6. D
7. B
8. A
9. B
10. A
11. B
12. A
13. B
14. B
15. D
16. D
17. C
18. D
19. C
20. B
21. B
22. A
23. B
24. C
25. D
26. C
27. B
28. B
29. A
30. C
31. B
32. A
33. B
34. A
35. A
36. A
37. C
38. B
39. C
40. B
41. A
42. B
43. B
44. C
45. C
46. C
47. C
48. C
49. B
50. C
51. C
52. A
53. B
54. B
55. A
SHORT ANSWER
56. Precision is how close a set of measurements of the same quantity are. Accuracy is how close a measurement is to the true value.
57. Isotopes are atoms of the same element with different numbers of neutrons and therefore different mass numbers.
58. A mole is a collection of atoms that is large enough to measure in the laboratory. A single atom is too small.
59. cheers
