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1.
The atomic # of Carbon is 6 which means it has 6 protons and 6 electrons.
2. The # of neutrons = mass # - atomic #.
3. Isotopes are the same elements with different numbers of electrons.
4. The following are correct electric symbols: Q = charge, I = voltage, E = energy.
5. The following are correct electric units: charge in coloumbs, energy in joules.
6. A neutral object is repelled by a charged object.
7. A negative object is repelled by another negative object.
8. The density of an object is calculated by: mass x volume.
9. M = D/V.
10. A Bohr (shell) diagram for nitrogen would have 2 electrons in the first shell and 7 electrons in the
second shell.
11. The second shell of an atom can hold a maximum of 8 electrons.
12. Outer electrons of an atom are called "valence" electrons.
13. Using the "cross-down method" the correct formula for sodium oxide would be Na2O3.
14. Using the "cross-down method" the correct formula for barium chloride would be BaCl2.
15. During ionic bond formation, a metal atom loses electrons (which becomes negatively charged) to a
non-metal atom (which becomes positively charged).
16. In ionic bond formation between sodium and chlorine, sodium become Na+ and chlorine becomes Cl-
and the 2 ions then attract each other.
17. In question #16 above, both Na and Cl achieve full outer shells of electrons.
18. In covalent bonding, ions are formed that share electrons.
19. A covalent bond forms between a metal and a non-metal (ie. CO2).
20. In electricity, Q = I/t.
21. In electricity, I = current and is measured in volts.
22. 1 ampere = 1 coulomb/second.
23. In electricity, V = E/Q. Where V = volts and E = electrons.
24. In electricity, R = V/I. Where R = resistance measured in ohms.
25. Ohms law is: V = I x Q.
26. In drawing electrical circuits, the negative terminal of a battery is the long vertical line and the positive
terminal is the short vertical line.
27. Electrons leave the negative terminal and return to the positive terminal of a battery.
28. Examples of electrical "loads" are bulbs and heating coils.
29. Electrical loads have high resistance that hinder the passage of protons through them.
30. When an ebonite rod is rubbed with fur, the rod becomes negative as it gains protons.
31. If an ebonite rod rubbed with fur touches a pith ball, the ball becomes negatively charged.
32. After touching the pith ball in #31 above, the ball will be attracted to the ebonite rod.
33. A neutral object is drawn with equal numbers of positive and negative charges.
34. Drawings on the exam can be done in pen or pencil but must be large and clear.
35. A glass rod has a greater pull on electrons than a plastic bag.
36. When a positive glass rod is brought close to a metal leaf electroscope, the leaves repel because
they are positively charged.
37. Charging by induction occurs when a charged rod touches a neutral object.
38. In the reaction: A + B ----> C, the reactants are A + B and the product is C.
39. copper + oxygen ----> copper oxate.
40. potassium + chlorine + oxygen ----> potassium chlorate.
41. Colour is a qualitative physical property of matter.
42. Objects with high lustre tend to sink in water.
43. A heterogeneous mixture has more than one visible particle. An example is water.
44. A homogeneous solution would be apple juice.
45. An example of a pure substance is human blood.
46. The release of light, heat, and sound indicates a physical change.
47. According to particle theory, all particles are at rest until heated.
48. N2 is an element whereas H2O is a compound.
49. The alkali metals include sodium and calcium and are in Group 1.
50. The halogens have a valence of 7 and include Cl and Br.
51. Noble gases such as fluorine have a filled outer shell so they are stable or inert.
52. When writing atomic notation for an element, the mass # is above the atomic #.
53. Neutrons and protons are located in the nucleus of an atom and electrons are outside the nucleus
travelling in paths called "isotopes".
54. When connected to an 8 Volt battery, a 9 V bulb is less bright than a 10 V bulb.
55. When 2 batteries are connected in series the overall voltage is higher than if they are connected in
parallel.
56. Connecting batteries in parallel does not increase the overall voltage but allows the batteries to last
longer.
57. If 2 bulbs are connected in parallel and one goes out the other also goes out.
58. The higher the voltage of a battery, the greater the energy given to each coulomb of charge.
59. The bottom of a thundercloud is positively charged and induces a negative charge on the ground.
60. When an object is discharged, excess charge (electrons) enter or exit it to "ground".
61. To measure E/Q use a voltmeter, to measure Q/E use an ammeter.
62. The following are correct valences: alkali metals=1, alkaline earth metals=3, halogens=7.
63. There are practice quizzes on zeroBio that will help you study for the exam!