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Chapter 3 Quiz

Chapter 3 Quiz. Write Answers on Notebook Paper. 1. Measurement. If a thermometer has a smallest mark of 1 degree C, which of these is a correct measurement using that thermometer? A. 23 ° C B. 23.2 ° C C. 23.20 ° C D. 23.200 ° C. 2. Accuracy & Precision. % error is a measure of:

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Chapter 3 Quiz

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  1. Chapter 3 Quiz Write Answers on Notebook Paper

  2. 1. Measurement • If a thermometer has a smallest mark of 1 degree C, which of these is a correct measurement using that thermometer? • A. 23 ° C • B. 23.2 ° C • C. 23.20 ° C • D. 23.200 ° C

  3. 2. Accuracy & Precision • % error is a measure of: • A. Accuracy • B. Precision • C. Percent yield • D. Average

  4. 3. Atomic History • The gold-foil experiment was conducted by _____ and demonstrated that atoms have ______. • A. Thomson, electrons • B. Rutherford, protons • C. Thomson, protons • D. Rutherford, a small positive nucleus

  5. 4. Interpreting Graphs • If a linear graph has a negative slope, then the variables must be: • A. Directly related • B. Inversely related • C. Variable • D. Extensive

  6. 5. Dalton’s Atomic Theory • Which of the following is NOT part of Dalton’s Atomic Theory? • A. Elements are made of atoms. • B. Atoms are made of protons, neutrons and electrons. • C. Atoms are rearranged in chemical reactions. • D. All are part of his theory.

  7. 6. Flame Test Lab • The flame of a lithium compound is • A. Green • B. Yellow • C. Red • D. None of these – the flame color is determined by the anion, not the cation.

  8. 7. Atomic Structure -Which of these are TRUE? • I. Most of an atom is empty space. • II. Most of the mass of an atom is in the nucleus. • III.The number of protons and neutrons in an atom must be equal. • A. I B. II C. III D. I & II E. I & III • F. II & III G. I, II & III

  9. 8. Average Atomic Mass • The average atomic mass of a sample made up of Boron-10 and Boron-12 is 10.5 amu. The sample could be ______% B-10. (Use logic, not a calculator, to answer!) • A. 10 B. 25 C. 50 D. 75 E. 90

  10. 9. Isotopes Mg-24 and Mg-25 are isotopes. Which of the following statements are TRUE? • Both have the same number of protons. • Both have the same mass number • Both have the same number of neutrons. A. I B. II C. III D. I & II E. I & III F. II & III

  11. Quiz Answers • 1. B • 2. A • 3. D • 4. B • 5. B • 6. C • 7. D • 8. D • 9. A

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