Chapter 3 Quiz - Mr. McKnight's Chemistry

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Chapter 3 Quiz
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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
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% error is a measure of:
A. Accuracy
B. Precision
C. Percent yield
D. Average
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
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
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.
6. Flame Test Lab
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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.
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
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
9. Isotopes
Mg-24 and Mg-25 are isotopes. Which of
the following statements are TRUE?
I. Both have the same number of protons.
II. Both have the same mass number
III. Both have the same number of
neutrons.
A. I B. II C. III D. I & II E. I & III F. II & III
Quiz Answers
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