Practice Quiz

Praxis II: Chemistry Exam Prep - Question List

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26. Which of the following solutions is blue?
  1. .1 M Cu(NO3)2
  2. .1 M NaNO3
  3. .1 M CaCl2
  4. .1 M KNO3
  5. .1 M MgCl2
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27. How many electrons are in the outermost shell of aluminum?
  1. 13
  2. 10
  3. 8
  4. 7
  5. 3
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28. A neutral element has a mass number of 23 and 12 neutrons. What is the identity of this element?
  1. Sodium
  2. Magnesium
  3. Vanadium
  4. Krypton
  5. Iodine
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29. A neutral element has a mass number of 129 and 75 neutrons. What is the identity of this element?
  1. Copper
  2. Tungsten
  3. Rhenium
  4. Uranium
  5. Xenon
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30. The emission spectrum of an element is:
  1. The spectrum given off by a heated gas when its excited electrons release photons
  2. The spectrum observed from a cool gas, where black lines on the spectrum indicate photons used to excite electrons
  3. The spectrum given off by a cool gas when its excited electrons release photons
  4. The spectrum observed from a heated gas, where black lines on the spectrum indicate photons used to excite electrons.
  5. The range of gases emitted during a chemical reaction.
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