Test Bank for Chemical Principles 8th Edition Zumdahl / All Chapters 2 - 21 / Full Complete 2023

Chapter 02 - Atoms, Molecules, and Ions Chemical Principles 8th Edition Zumdahl Test Bank 1. According to the law of definite proportions, a. the ratio of the masses of the elements in a compound is always the same. b. it is not possible for the same two elements to form more than one compound. c. if the same two elements form two different compounds, they do so in the same ratio. d. the total mass after a chemical change is the same as before the change. ANSWER: a POINTS: 1 DIFFICULTY: easy TOPICS: 2.2 KEYWORDS: compound | general chemistry | general concepts | matter 2. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? a. CaO and CaCl 2 b. NO and NO2 c. H2S and HBr d. SiH 4 and SiO 2 e. NF3 and NCl 3 ANSWER: b POINTS: 1 DIFFICULTY: easy TOPICS: 2.2 KEYWORDS: compound | general chemistry | general concepts | matter 3. How many of the following did Dalton not discuss in his atomic theory? I. isotopes II. ions III. protons IV. neutrons V. electrons a. 2 b. 5 c. 4 d. 1 e. 3 ANSWER: b POINTS: 1 DIFFICULTY: easy TOPICS: 2.3 KEYWORDS: atomic theory of matter | Dalton's atomic theory | early atomic theory | general chemistry Chapter 02 - Atoms, Molecules, and Ions 4. When 2.0 L of oxygen gas (O2) reacts with 1.0 L of nitrogen gas (N2), 2.0 L of gaseous product is formed. All volumes of gases are measured at the same temperature and pressure. What is the formula of the product? a. NO b. NO4 c. N2O3 d. N2O e. NO2 ANSWER: e POINTS: 1 DIFFICULTY: easy TOPICS: 2.4 KEYWORDS: chemical formula | chemical substance | early atomic theory | general chemistry | molecular substance 5. Which one of the following statements about atomic structure is false? a. Almost all of the mass of the atom is concentrated in the nucleus. b. The protons and neutrons in the nucleus are very tightly packed. c. The number of protons and the number of neutrons are always the same in the neutral atom. d. The electrons occupy a very large volume compared to the nucleus. ANSWER: c POINTS: 1 DIFFICULTY: easy TOPICS: 2.4 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | nuclear structure 6. Which of the experiments listed below did not provide the information stated about the nature of the atom? a. The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was essentially correct. b. The Rutherford experiment determined the charge on the nucleus. c. The cathode -ray tube proved that electrons have a negative charge. d. Millikan' s oil-drop experiment showed that the charge on any particle was a simple multiple of the charge on the electron. ANSWER: a POINTS: 1 DIFFICULTY: easy TOPICS: 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | structure of the atom 7. Which of the following atomic symbols is incorrect? a. 3115P Chapter 02 - Atoms, Molecules, and Ions b. 199F c. 3417Cl d. 3919K e. 158C ANSWER: e POINTS: 1 DIFFICULTY: easy TOPICS: 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope 8. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium -185 has in its nucleus a. 75 protons, 110 neutrons. b. 75 protons, 75 neutrons. c. 75 protons, 130 neutrons. d. 130 protons, 75 neutrons. e. not enough information is given. ANSWER: a POINTS: 1 DIFFICULTY: easy TOPICS: 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope 9. Which of the following statements is(are) true? I. O and F have the same number of neutrons. II. C and N are isotopes of each other because their mass numbers are the same. III. O2– has the same number of electrons as Ne. a. I only b. II only c. III only d. I and II only e. I and III only ANSWER: c POINTS: 1 DIFFICULTY: moderate TOPICS: 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope 10. Which among the following represent a set of isotopes? Atomic nuclei containing I. 20 protons and 20 neutrons. Chapter 02 - Atoms, Molecules, and Ions II. 21 protons and 19 neutrons. III. 22 neutrons and 18 protons. IV. 20 protons and 22 neutrons. V. 21 protons and 20 neutrons. a. I, V b. III, IV c. I, II, III d. I, IV and II, V e. No isotopes are indicated. ANSWER: d POINTS: 1 DIFFICULTY: moderate TOPICS: 2.5 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope 11. How many protons, neutrons, and electrons does the atom 39K have? a. 20 protons, 19 neutrons, 20 electrons b. 19 protons, 19 neutrons, 39 electrons c. 20 protons, 20 neutrons, 19 electrons d. 19 protons, 19 neutrons, 19 electrons e. 19 protons, 20 neutrons, 19 electrons ANSWER: e POINTS: 1 DIFFICULTY: easy TOPICS: 2.6 KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | isotope 12. An ion is formed I. by either adding protons to or subtracting protons from the atom. II. by either adding electrons to or subtracting electrons from the atom. III. by either adding neutrons to or subtracting neutrons from the atom. a. Only I is true. b. Only II is true. c. Only III is true. d. All of the statements are true. e. Two of the statements are true. ANSWER: b POINTS: 1 DIFFICULTY: easy TOPICS: 2.6 KEYWORDS: chemical formula | chemical substance | early atomic theory | general chemistry | ionic substance