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e4_f06 - CHE 131 Final Exam Fall 2006 Multiple Choice 2...

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CHE 131 Final Exam, Fall 2006 Multiple Choice, 2 points each Identify the letter of the choice that best completes the statement or answers the question. 1. All atoms, isotopes, and ions of chlorine have the same A. number of electrons. B. number of protons. C. mass. D. number of neutrons. E. number of protons and electrons. 2. What is the total number of unpaired electrons in the ground state of the oxygen atom? 3. Lithium, beryllium, sodium, and magnesium are neighbors in the Periodic Table as shown below. Which one of the following statements is correct about these four elements? Group 1 Group 2 Li Be Na Mg 4. Barium sufate, BaSO 4 , has 5. Which one of the following molecules is most polar? A. H 2 B. F 2 C. HF D. ClF E. CO
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