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- 1. Open EndedWhich of the following properties of Na metal is a physical property? a. Na tends to give up an election to form ionic compounds b. Na has a high electrical conductivity c. Na when dropped into water, causes the evolution of H_2 gas. d. Na reacts violently with Oxygen
- 2. Open EndedWhich of the following properties is NOT an intensive property? a. Density b. Color c. Combustibility d. Melting point e. Mass
- 3. Open EndedWhich of the following materials has NOT been properly classified? a. Apple juice is a homogenous mixture b. Antimony is an element c. A snow cone is a heterogeneous mixture d. Steel is a compound e. Granite is a heterogeneous mixture
- 4. Open EndedIf liquid methanol has a density of 0.79 g/mL, how many mL of it must one measure out in order to have 50 grams? a. 79 mL b. 50 mL c. 39.5 mL d.1.58 *10^-2 mL e. 63 mL
- 5. Open EndedA motorcycle engine has a displacement volume of 650 cubic centimeters (cm^3). What is the volume in cubic inches? (Hint 1 in. = 2.54 cm) a. 260 in^3 b. 40 in^3 c. 11000 in^3 d. 1600 in^3
- 6. Open EndedThe fact that the compound calcium carbonate is made up of 40 calcium, 12% carbon, and 48% oxygen is an illustration of the Law of: a. Constant Composition/ Definite Proportions b. Conservation of Mass c. Multiple Proportions d. Conservation of Energy e. The Jungle
- 7. Open EndedWhich of the following numbers has 4 significant figures? a. .04309 b. .0430 c. .043090 d. .43980
- 8. Open EndedWhat answer should be reported if 0.57 cm is subtracted from 10.003 cm? a. 9.4 cm b. 9.433 cm c. 9 cm d. 9.43 cm e. 9.430 cm
- 9. Open EndedWhen the calculation (32.8070 x 1.0200) / 0.000201 is carried out, the number of significant figures in the answer is: a. 2 b. 3 c. 4 d. 5
- 10. Open EndedThe cathode "rays" in Thompson's cathode ray tube experiment were actually: a. Photons b. Electrons c. Protons d. Neutrons e. Positive atomic ions
- 11. Open EndedThe smallest particle of an element that maintains the chemical identity of the element is: a. A nuclide b. An electron c. A molecule d. A proton e. An atom
- 12. Open EndedWhich of the following elements has the least metallic character? a. Titanium b. Sodium c. Silicon d. Fluorine
- 13. Open EndedIdentify the INCORRECT statement below: a. In the most fundamental sense, the properties of the elements are periodic functions of their atomic weights b. The periodic law of the elements was first noted by Mendeleev and Meyer in the Mid 1800's c. The vertical columns of the periodic chart are called groups, sharing similar properties d. Elements Li, B, N, and F are all in the same period
- 14. Open EndedHow many of the three types of elementary particles are present in the sodium ion ^23 Na^+ ? a. 11 protons, 12 neutrons, 10 electrons b. 11 protons, 11 neutrons, 11 electrons c. 11 protons, 23 neutrons, 10 electrons d. 11 protons, 23 neutrons, 11 electrons
- 15. Open EndedIf Thompson's "plum pudding" model of the atom had been correct, the alpha particles in Rutherford's gold foil experiment would have: a. all gone through the foil with no deflections at all b. all bounced back from the foil c. all gone through the foil with only minor deflections
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