Unit 2 Self-Quiz, pages 270–271
1. (d)
2. (b)
3. (a)
4. (c)
5. (d)
6. (b)
7. (b)
8. (b)
9. (a)
10. (b)
11. (c)
12. (b)
13. (a)
14. (d)
15. (a)
16. (a)
17. (b)
18. (d)
19. (a)
20. (c)
21. (d)
22. (a)
23. (a)
24. (d)
25. False. The neutron is the most massive particle in the atom.
26. False. The neutron is an uncharged subatomic particle.
27. True
28. True
29. False. A line spectrum results when excited electrons emit energy.
30. True
31. False. John Dalton originated the idea that the atom is the smallest and indivisible unit of matter.
32. True
33. False. According to the Pauli exclusion principle, in a given atom, 2 electrons cannot share the
same set of four quantum numbers.
34. True
35. False. Ionic compounds have electrostatic charge.
36. True
37. True
38. False. Carbon dioxide molecules have a linear shape.
39. False. In a polar covalent bond electrons are not shared equally between atoms.
40. True
41. True
42. True
43. False. Semiconductors are doped with atoms that have 1 more or 1 fewer valence electrons than
the semiconductor atoms.
Copyright © 2012 Nelson Education Ltd.
Unit 2: Structure and Properties of Matter
U2-10