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Name: ________________________ Class: ___________________ Date: __________ ID: A Chapter 4: Atomic Structure Retake 2013 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago? A. Compounds are made by combining atoms. B. Atoms of different elements can combine with one another in simple whole number ratios. C. Atoms are tiny indivisible particles. D. Atoms of the same element are identical. ____ 2. Which of the following is true about subatomic particles? A. Protons are positively charged and the lightest subatomic particle. B. Neutrons have no charge and are the lightest subatomic particle. C. The mass of a neutron nearly equals the mass of a proton. D. Electrons are negatively charged and are the heaviest subatomic particle. ____ 3. The gold foil experiment performed in Rutherford's lab __________. A. was the basis for Thomson's model of the atom B. proved the law of multiple proportions C. confirmed the plum-pudding model of the atom D. led to the discovery of the atomic nucleus E. utilized the deflection of beta particles by gold foil ____ 4. There are __________ protons, __________ neutrons, and __________ electrons in 131I-. A. 78, 53, and 72 B. 131, 53, and 52 C. 53, 131, and 52 D. 131, 53, and 54 E. 53, 78, and 54 ____ 5. The sum of the protons and neutrons in an atom equals the ____. A. atomic mass B. mass number C. atomic number D. nucleus number ____ 6. The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu. A. 218.5 B. 220.42 C. 220.4 D. 219.7 ____ 7. Because a few alpha particles bounced back from the foil, Rutherford concluded that they were A. magnetic. B. striking electrons. C. indivisible. D. repelled by densely packed regions of positive charge. ____ 8. Isotopes of the same element have different ____. A. positions on the periodic table B. chemical behavior C. mass numbers D. atomic numbers ____ 9. Cathode rays are deflected away from a negatively charged plate because __________. A. they are emitted by all matter B. they are neutral particles C. they are negatively charged particles D. they are positively charged particles E. they are not particles ____ 10. Chlorine has atomic number 17 and mass number 35. It has A. 17 protons, 17 electrons, and 52 neutrons. B. 17 protons, 17 electrons, and 18 neutrons. C. 18 protons, 18 electrons, and 17 neutrons. D. 35 protons, 35 electrons, and 17 neutrons. 1 Name: ________________________ ID: A ____ 11. The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu. A. 34.02 B. 35.22 C. 30.20 D. 33.20 E. 32.73 ____ 12. Who was the man who lived from 460B.C.–370B.C. and was among the first to suggest the idea of atoms? A. Thomson B. Democritus C. Atomos D. Dalton ____ 13. Phosphorus-33 (atomic number 15) contains A. 18 protons. B. 18 neutrons. C. 33 protons. D. 33 neutrons. ____ 14. Who conducted experiments to determine the quantity of charge carried by an electron? A. Thomson B. Millikan C. Dalton D. Rutherford ____ 15. Which isotope has 45 neutrons? A. 34 Cl B. 80 Br C. 78 Se D. 80 Kr E. 103 Rh 17 35 34 36 45 ____ 16. An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for this atom? V C. 52 Cu D. 52 V A. 296 C B. 29 23 23 23 ____ 17. The atomic number indicates __________. A. the number of different isotopes of an element B. the number of atoms in 1 g of an element C. the number of neutrons in a nucleus D. the number of protons or electrons in a neutral atom E. the total number of neutrons and protons in a nucleus ____ 18. Which of the following is correct concerning subatomic particles? A. The electron was discovered by Goldstein in 1886. B. The neutron was discovered by Chadwick in 1932. C. Cathode rays were found to be made of protons. D. The proton was discovered by Thomson in 1880. ____ 19. Which of the following sets of symbols represents isotopes of the same element? 92 A. 84 M 86 M 87 M B. 50 L 50 L 50 L C. 138 Q 133 Q 133 Q D. 91 J J 38 38 38 19 20 21 59 55 54 42 42 93 40 J ____ 20. Which of the following equals one atomic mass unit? A. the mass of one helium-4 atom B. the mass of one carbon-12 atom C. the mass of one electron D. one-twelfth the mass of one carbon-12 atom 2 ID: A Chapter 4: Atomic Structure Retake 2013 Answer Section MULTIPLE CHOICE 1. ANS: OBJ: 2. ANS: OBJ: 3. ANS: 4. ANS: 5. ANS: OBJ: 6. ANS: 7. ANS: OBJ: 8. ANS: OBJ: 9. ANS: 10. ANS: OBJ: 11. ANS: 12. ANS: OBJ: 13. ANS: OBJ: 14. ANS: OBJ: 15. ANS: 16. ANS: NAT: 17. ANS: 18. ANS: OBJ: 19. ANS: OBJ: 20. ANS: OBJ: C PTS: 1 DIF: L2 REF: p. 104 4.1.2 Explain Dalton's atomic theory. C PTS: 1 DIF: L2 REF: p. 104 | p. 105 | p. 106 4.2.1 Identify three types of subatomic particle. D PTS: 1 DIF: 1 REF: Sec. 2.2 E PTS: 1 DIF: 2 REF: Sec. 2.7 B PTS: 1 DIF: L1 REF: p. 111 4.3.1 Explain what makes elements and isotopes different from each other. C PTS: 1 D PTS: 1 DIF: I REF: 2 2 C PTS: 1 DIF: L1 REF: p. 112 | p. 113 4.3.1 Explain what makes elements and isotopes different from each other. C PTS: 1 DIF: 1 REF: Sec. 2.2 B PTS: 1 DIF: III REF: 3 3 D PTS: 1 DIF: 1 REF: Sec. 2.4 B PTS: 1 DIF: L2 REF: p. 101 4.1.1 Describe Democritus's ideas about atoms. B PTS: 1 DIF: III REF: 3 3 B PTS: 1 DIF: L2 REF: p. 105 4.2.1 Identify three types of subatomic particle. B PTS: 1 DIF: 1 REF: Sec. 2.3 D PTS: 1 DIF: Bloom's Level 3 UCP.2 | B.1 D PTS: 1 DIF: 1 REF: Sec. 2.3 B PTS: 1 DIF: L3 REF: p. 105 | p. 106 4.2.1 Identify three types of subatomic particle. A PTS: 1 DIF: L3 REF: p. 112 | p. 113 4.3.1 Explain what makes elements and isotopes different from each other. D PTS: 1 DIF: L1 REF: p. 114 4.3.3 Calculate the atomic mass of an element. 1