Sample Test 2 SAMPLE TEST CHAPTER 2 2.1 Atomic Structure and Subatomic Particles 1. Which statement about electrons is false? a. All atoms have electrons as part of their structure. b. Electrons have much less mass than any atom. c. Electrons are found in the nucleus of the atom. d. Electrons are negatively charged. e. Electrons are attracted to positively charged electrodes. 2. The electrical nature of matter can best be demonstrated by an atom's a. radioactivity b. behavior on photographic paper c. behavior in a cathode ray tube d. atomic weight e. atomic number 3. The Millikan oil drop experiment was used to determine a. the nuclear character of the atom b. whether the atom was radioactive c. the electron distribution in the atom d. the atomic number of an atom e. the charge of an electron 4. When an atom loses electrons, __________ are formed. a. ions b. protons c. neutrons d. nuclei e. alpha particles 2.2 The Nuclear Atom 5. Which of the following statements concerning the atom is false? a. The atom contains protons, neutrons and electrons. b. Protons are found in orbits about the nucleus. c. Most of the mass of the atom is found in the nucleus. d. The nucleus contains both protons and neutrons. e. Chemical reactions involve only the electrons. 6. Rutherford's gold foil experiment used alpha particles to reveal that: a. isotopes exist b. atoms have electrons c. atoms have neutrons d. atoms are radioactive e. atoms have a nucleus 2.3 The Sizes of Atoms and the Units to Represent Them 7. Which metric prefix means 1000? a. kilo b. nano c. pico d. micro e. milli 8. Which metric prefix means 1 x 10-9? a. kilo b. nano c. pico d. micro e. milli 9. There are __________ milligrams in a gram. a. 1 x10-3 b. 1 x 10-6 c. 1 x 103 d. 1 x 106 e. 1 x 109 10. There are __________ millimeters in a centimeter. a. 1 x 10-1 b. 1 x 10-2 c. 1 x 101 d. 1 x 102 e. 1 x 103 11. How many centimeters are in 21 feet? a. 4.4 cm b. 53 cm c. 99 cm d. 250 cm e. 640 cm 12. How many millimeters are in 6.450 yards? a. 589.8 mm b. 491 mm c. 914 mm d. 1966 mm e. 5898 mm 13. How many liters are in 15.5 gallons? a. 16.4 L b. 62.0 L c. 65.7 L d. 58.5 L e. 14.6 L 14. Converting 75.8 pounds to kilograms yields: a. 29.8 kg b. 34.5 kg c. 167 kg d. 193 kg e. 758 kg 15. Converting 6.390 pounds to grams yields: a. 2899 g b. 6390 g c. 14090 g d. 2516 g e. 16230 g 16. How many microliters (uL) are in 89.63 L? a. 8.963 x10-4 uL b. 8.963 x 10-7 uL c. 8.963 x104 uL d. 8.963 x 107 uL e. 8.963 x 1010 uL 17. How many millimeters are in 3.00 feet? a. 914 mm b. 91.4 mm c. 91400 mm d. 762 mm e. 76.2 mm 18. A box has dimensions of 1.51 in. by 2.74 in. by 4.72 in. What is its volume in cubic centimeters? a. 1.19 cm3 b. 0.841 cm3 c. 7.69 cm3 d. 320. cm3 e. 49.6 cm3 19. A piece of paper measures 8.50 in. by 11.0 in. Calculate the area of the piece of paper in square centimeters. a. 237 cm2 b. 93.5 cm2 c. 603 cm2 d. 466 cm2 e. 14.5 cm2 20. Electromagnetic radiation having a wavelength of 674 nm is in the red region of the visible spectrum. Converting this wavelength into centimeters yields: a. 2.65 x 10-7 cm b. 6.74 x 10-5 cm c. 265 cm d. 6.74 x10-7 cm e. 6.74 x 10-4 cm 2.4 Atomic Numbers and Mass Numbers 21. Which of the following is incorrect? a. 63Cu has 29 protons, 29 electrons and 34 neutrons b. 55Mn has 25 protons, 25 electrons and 30 neutrons c. 37Cl has 20 protons, 20 electrons and 20 neutrons d. 74Se has 34 protons, 34 electrons and 40 neutrons e. 40Ar has 18 protons, 18 electrons and 22 neutrons 22. An element containing 32 protons, 32 electrons and 41 neutrons will have the symbol: a. 73Ta b. 41Ge c. 41Nb d. 73Nb e. 73Ge 23. Which element has an atomic number of 35 and mass number of 80? a. 35Br b. 80Hg c. 80Br d. 35Hg e. 35Cl 24. Which of the following statements is not true? a. b. c. d. e. 51 23 V has an atomic number of 23. 95 42 Mo contains 53 neutrons. 66 30 Zn has the same number of electrons and pr 56 26 Fe has the same number of neutrons and pr 12 6 C has the same number of protons, neutrons 25. Which of the following represent a pair of isotopes? 37 37 17 17 Cl Ar O 17 18 8 9F I II III IV V a. I and II b. I and III c. III and IV d. I and IV e. II and V 2.5 Isotopes and Atomic Weights 26. Which statement best describes isotopes? a. atoms with the same number of protons and different numbers of neutrons b. atoms with the same number of neutrons and a different number of protons c. atoms with the same numbers of protons and neutrons d. atoms in the same horizontal period e. atoms in the same vertical family 27. Which of the following statements about two isotopes is false? a. They will have the same atomic numbers. b. They will have the same atomic weights. a. 2.57 moles b. 0.389 moles c. 1210 moles d. 0.835 moles e. 1.20 moles 34. How many grams of magnesium (Mg) contain the same number of atoms as 10 28. Which of the following statements g of neon (Ne)? a. 6 g b. 8 g c. 10 g concerning isotopes is true? d. 12 g e. 24 g a. Every element has 3 isotopes. 35. How many grams of carbon (C) contain b. All isotopes of a given element are radioactive. the same number of atoms as 80 g of c. Various isotopes of the same element neon (Ne)? a. 12 g exhibit very different chemical reactivity. b. 24 g d. Various isotopes of the same element c. 36 g have the same mass. d. 48 g e. Various isotopes of the same element e. 60 g will have the same number of protons. 38Mass and Problem 40 29.Assume that only two isotopes of argon, 2.7 Molar Solving Ar and Ar exist in nature. 36. How many 18 atoms are in18 a 10.0 g sample of If this were true, the atomic weight of argon wouldmolybdenum fall most closely within which range? (Mo)? 23 a. 1.10 x 10 a. 18-58 amu b. 56-58 amu b. 1.43 x 1023 c. 18-38.5 amu c. 6.27 x 1022 d. 38-40 amu d. 2.53 x 1026 30. An element that has 36 protons and 48 e. 5.78 x 1026 neutrons has an approximate atomic 37. How many atoms are in a 25.0 g sample of weight of: beryllium? a. 12 amu a. 1.67 x 1024 b. 36 amu b. 3.76 x 1023 c. 48 amu c. 2.52 x 1024 d. 60 amu e. 84 amu d. 6.02 x 1025 31. If the isotopic ratio of the two boron e. 1.35 x 1026 10 11 isotopes B (10.013 amu) and B 38. Which sample contains the fewest number (11.009 amu) has been altered from the of atoms? ratio found in nature and now contains a. 10 g of F b. 10 g of N 48.73% 10B, determine the atomic c. 10 g of O weight of the sample of boron. d. 10 g of C a. 10.811 amu e. 10 g of Ne b. 10.013 amu 39. Which sample contains the fewest c. 11.009 amu number of atoms? d. 10.524 amu a. 125 g Fe e. 10.498 amu b. 225 g C 2.6 Amounts of Substances and the c. 50 g Xe Mole d. 25 g Ca 32. Calculate the number of grams in 0.125 e. 50 g Li moles of nitrogen atoms. 40. Which sample contains the greatest a. 0.0107 g number of atoms? b. 3.50 g a. 50 g P c. 112 g b. 50 g Br d. 1.75 g c. 50 g Ca e. 0.0046 g d. 50 g Ti 33. Calculate the number of moles e. 50 g Ba represented by 21.7 g Fe. c. They will have the same charge on the nucleus. d. They will have different numbers of neutrons. e. They will have essentially the same chemical reactivity. 41. Which sample contains the greatest number of atoms? a. 512 g Mg b. 619 g Pt c. 435 g Ni d. 642 g Rb e. 216 g Cr 42. Which sample contains the same number of atoms as 175.0 g of cadmium (Cd)? a. 305 g Sn b. 306 g Au c. 225 g Pb d. 175 g Hg e. 142 g Ir 2.8 The Periodic Table 43. Which element can be classified as a lanthanide? a. Sr b. Sm c. Sn d. Se e. Sb 44. Which element can be classified as a halogen? a. Br b. Xe c. Ga d. U e. Ca 45. Which element can be classified as a noble gas? a. O b. Na c. Kr d. Ti e. P 46. Which element can be classified as a transition metal? a. N b. Ne c. Ce d. Co e. Sr 47. Which element can be classified as an alkaline earth metal? a. Ag b. Au c. Na d. Al e. Mg 48. Which element is highly reactive? a. K b. Cu c. Kr d. C e. Al 49. Which element is the least reactive and is found uncombined in nature? a. Au b. Ne c. N d. Cu e. Fe 50. Three elements that are likely to have similar chemical and physical properties are: a. Sr, Se, Sb b. K, Ca, Sc c. Sc, Ti, V d. Ca, Sr, Ba e. H, Fe, F ANSWER KEY FOR SAMPLE TEST 2 1. c 2. c 3. e 4. a 5. b 6. e 7. a 8. b 9. c 10. c 11. e 12. e 13. d 14. b 15. a 16. d 17. a 18. d 19. c 20. b 21. c 22. e 23. c 24. d 25. e 26. a 27. b 28. e 29. d 30. e 31. d 32. d 33. b 34. d 35. d 36. c 37. a 38. e 39. c 40. a 41. a 42. b 43. b 44. a 45. c 46. d 47. e 48. a 49. b 50. d