Introductory Chemistry An Active Learning Approach 6th Edition By Mark S. Cracolice – Test Bank

1. Which of the following defines a correct relationship for electromagnetic radiation?
a.
b.
c.
d.
e.
ANSWER: e
RATIONALE: Analysis:
A. Incorrect. See Section 11.1, Goal 1. B. Incorrect. See Section 11.1, Goal 1. C. Incorrect. See Section 11.1, Goal 1. D. Incorrect. See Section 11.1, Goal 1. E. Correct.
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2. Which of the following statements is/are correct?
i. Visible light is a very small part of the entire electromagnetic spectrum.
ii. Low frequency electromagnetic radiation has a short wavelength
iii. Electromagnetic radiation travels at a finite speed
a. i only
b. ii only
c. iii only
d. i and ii
e. i and iii
ANSWER: e
RATIONALE: Analysis: A. Incorrect. See Section 11.1, Goal 1. B. Incorrect. See Section 11.1, Goal 1. C. Incorrect. See Section 11.1, Goal 1. D. Incorrect. See Section 11.1, Goal 1. E. Correct.
POINTS: 1

3. Which of the following statements is/are correct?
i. Wavelength is the distance between identical parts of a wave
ii. Frequency is the number of complete waves passing a point in a given period of time
iii. The speed of light is equal to the product of the wavelength and frequency of an electromagnetic wave
a. i only
b. iii only
c. i and ii
d. ii and iii
e. i, ii, and iii
ANSWER: e
RATIONALE: Analysis: A. Incorrect. See Section 11.1, Goal 1. B. Incorrect. See Section 11.1, Goal 1. C. Incorrect. See Section 11.1, Goal 1. D. Incorrect. See Section 11.1, Goal 1. E. Correct.
POINTS: 1

4. Which of the following statements is true?
a. The dark bands in a rainbow are examples of line spectra
b. The light from neon signs is used as a source for producing continuous spectra
c. The light from standard light bulbs is used as a source for producing line spectra
d. A continuous spectrum consists of an uninterrupted distribution of colored light
e. A continuous spectrum results when light from a heated elemental substance passes through a prism
ANSWER: d
RATIONALE: Analysis: A. Incorrect. See Section 11.1, Goal 2. B. Incorrect. See Section 11.1, Goal 2. C. Incorrect. See Section 11.1, Goal 2. D. Correct. E. Incorrect. See Section 11.1, Goal 2.
POINTS: 1

5. Which of the following statements is false?
a. Line spectra can be produced by holding a glass prism next to an incandescent light bulb.
b. Each element has a unique line spectrum.
c. The separate lines of color in a line spectrum are known as discrete lines.
d. The light emitted from a heated element forms a line spectrum when passed through a prism.
e. Line spectra can be produced by holding a glass prism next to a gas discharge tube.
ANSWER: a
RATIONALE: Analysis: A. Correct. B. Incorrect. See Section 11.2, Goal 2. C. Incorrect. See Section 11.2, Goal 2. D. Incorrect. See Section 11.2, Goal 2. E. Incorrect. See Section 11.2, Goal 2.
POINTS: 1

6. Which of the following statements is/are incorrect?
i. The Bohr model successfully predicts energies in the ultraviolet portion of the hydrogen spectrum
ii. The Bohr model successfully predicts energies in the infrared portions of the sodium spectrum
iii. The Bohr model associates electron energy with the radius at which an electron orbits the nucleus
iv. The Bohr model does not explain the failure of an electron to lose energy as it travels a circular path around a nucleus
a. i only
b. ii only
c. iii only
d. iv only
e. iii and iv
ANSWER: b
RATIONALE: Analysis: A. Incorrect. See Section 11.2, Goal 3. B. Correct. C. Incorrect. See Section 11.2, Goal 3. D. Incorrect. See Section 11.2, Goal 3. E. Incorrect. See Section 11.2, Goal 3.
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7. The Bohr model of the hydrogen atom gives specific information about all of the following except
i. Electron paths
ii. Orbital shapes
iii. Atomic radius
iv. Electron energies
v. Restrictions on the electron population of an orbital
a. i only
b. ii only
c. iii only
d. iv only
e. ii and v
ANSWER: e
RATIONALE: Analysis: A. Incorrect. See Section 11.2, Goal 3. B. Incorrect. See Section 11.2, Goal 3. C. Incorrect. See Section 11.2, Goal 3. D. Incorrect. See Section 11.2, Goal 3. E. Correct.
POINTS: 1

8. Which of the following is/are the major flaw(s) of the Bohr model of the hydrogen atom?
i. Hydrogen is the only atom that fits the model
ii. Circular orbits violate the Law of Conservation of Energy
iii. It explains atomic line spectra in terms of electron energies
iv. It introduced the idea of quantized electron energy levels in an atom
a. ii only
b. i and ii
c. i and iii
d. iii and iv
e. i, ii, and iii
ANSWER: b
RATIONALE: Analysis: A. Incorrect. See Section 11.2, Goal 3. B. Correct. C. Incorrect. See Section 11.2, Goal 3. D. Incorrect. See Section 11.2, Goal 3. E. Incorrect. See Section 11.2, Goal 3.
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9. Which of the following statements about atomic spectra is/are correct?
i. The discrete line spectrum of elements is evidence that electron energies are quantized
ii. Lines in the spectrum are discrete because electron energies are restricted to certain values
iii. Energy is emitted from atoms as electrons move from higher energy levels to lower energy levels
iv. Electron transitions of differing energies produce different wavelengths of light.
a. i and ii
b. i and iii
c. ii and iv
d. i, iii, and iv
e. All are correct statements.
ANSWER: e
RATIONALE: Analysis: A. Incorrect. See Section 11.2, Goal 4. B. Incorrect. See Section 11.2, Goal 4. C. Incorrect. See Section 11.2, Goal 4. D. Incorrect. See Section 11.2, Goal 4. E. Correct.
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10. Which of the following statements about atomic spectra is incorrect?
a. An atom must absorb energy before it can emit a spectral line
b. Only atoms in the ground state can radiate energy
c. An electron dropping between two specific energy levels always emits the identical spectral line
d. No two elements have identical atomic spectra
e. All of the statements above are correct (choosing this statement indicates that it is correct)
ANSWER: b
RATIONALE: Analysis: A. Incorrect. See Section 11.2, Goal 4. B. Correct. C. Incorrect. See Section 11.2, Goal 4. D. Incorrect. See Section 11.2, Goal 4. E. Incorrect. See Section 11.2, Goal 4.
POINTS: 1