Chemistry For Changing Times 14th Edition By Hill – Test Bank (100% Correct Questions and answers)

Chemistry For Changing Times 14th Edition By Hill – Test Bank Chemistry For Changing Times 14th Edition By Hill – Test Bank 1) Which statement best summarizes the general nature of investigations during the 1800s related to the acquisition and development of knowledge that provided glimpses into the atomic structure of matter? 1. A) Qualitative observations, influenced by ideas related to magic and mysticism, provide glimpses of the structure of matter. 2. B) Quantitative measurements of studies of compounds with fire, lead to the formulation of fundamental laws leading to an atomic theory of matter. 3. C) Electricity played an important role in unraveling the structure of the atom. 4. D) New experimental and mathematical techniques provided information concerning the organization of subatomic particles in atoms. Answer: C Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 2: Demonstrate the ability to think critically and employ critical thinking skills. Learning Obj: LO 3.1 Explain the electrical properties of an atom. 2) Electrolysis is 1. A) the production of electrical currents from a battery. 2. B) the chemical reactions caused by electricity. 3. C) the production of cathode rays in vacuum tubes using electricity. 4. D) the conversion of elements into new elements by the use of electricity. Answer: B Diff: 2 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.1 Explain the electrical properties of an atom. 3) The application of electricity to chemical systems provided much of the experimental evidence for the existence of subatomic particles. With respect to the use of electricity in studying matter, which one of the following scientists would NOT be grouped with the others? 1. A) Humphry Davy 2. B) Michael Faraday 3. C) J.J. Thomson 4. D) Ernest Rutherford Answer: D Diff: 2 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 2: Demonstrate the ability to think critically and employ critical thinking skills. Learning Obj: LO 3.2 Describe the properties of electricity explain the structure of atoms. 4) Ions are 1. A) charged atoms (or groups of atoms). 2. B) electrons. 3. C) neutrons. 4. D) electrodes. Answer: A Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.1 Explain the electrical properties of an atom. 5) A cation is a 1. A) negatively charged ion. 2. B) positively charged ion. 3. C) negative electrode. 4. D) positive electrode. Answer: B Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.1 Explain the electrical properties of an atom. 6) Electrolytes are important substances in the chemistry of living systems. An electrolyte is a compound that 1. A) conducts electricity when melted or put into solution. 2. B) generates light when electricity is applied. 3. C) contains electrons. 4. D) contains electrodes. Answer: A Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.1 Explain the electrical properties of an atom. 7) Cathode rays are beams of 1. A) anions. 2. B) electrons. 3. C) neutrons. 4. D) protons. Answer: B Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.2 Describe the properties of electricity explain the structure of atoms. 8) By measuring the deflection of cathode rays in electrical and magnetic fields, J.J. Thomson was able to determine the 1. A) mass of the electron. 2. B) speed of the electron. 3. C) charge on the electron. 4. D) ratio of mass to charge for the electron. Answer: D Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.2 Describe the properties of electricity explain the structure of atoms. 9) Which experimental observation led scientists to speculate that cathode rays contained particles that were constituents of all matter? 1. A) The rays were deflected by electrical fields. 2. B) The rays were deflected by magnetic fields. 3. C) The rays were independent of the type of gas in the vacuum tube. 4. D) All of the above provided evidence of the “fundamental” nature of cathode rays. Answer: C Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.2 Describe the properties of electricity explain the structure of atoms. 10) The existence of positively charged particles in gas discharge tubes was first experimentally verified by 1. A) Lavoisier. 2. B) Dalton. 3. C) Faraday. 4. D) Goldstein. Answer: D Diff: 1 Var: 1 Page Ref: Sec. 3.1 Global Obj: Global 1: Demonstrate an understanding of the principles of scientific inquiry. Learning Obj: LO 3.2 Describe the properties of electricity explain the structure of atoms.