Practice Exam II Answers - 2 Answer Key for Exam A Multiple...

Practice Exam II Answers
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2 Answer Key for Exam A Multiple Choice questions. 48 Points Choose the best answer from the list of choices. Use your scantron sheet and mark each answer clearly. Be sure to fully erase all changes. 1. An orbital is a reference to: I) a region of high electron density. II) a region in an atom where an electron is likely to be found. III) a wave function resulting from specific values assigned to quantum numbers in wave equa- tions. IV) a spherical region around a nucleus where an electron can be found. (a) II only (b) I and II (c) II and III (d) I, II, and III (e) I, II, III, and IV 2. Which of the following statements about electron spin is false? (a) An electron produces an electric field. (b) The electron’s magnetic field can be oriented in two dimensions. (c) Paired electrons produce no net magnetic field. (d) An experiment with silver atoms passing through a magnetic field seems to prove electron spin exists. (e) Electron spin only exists when m ` = 0. 3. The transition metals are similar because: (a) they are in the same period (b) they have filled subshells (c) they have high atomic masses (d) electrons are added to the core of the atoms rather than the outer shell (e) none of these answers fits 4. List in order of increasing atomic size: F, Na, K, Mg, Ne. (a) K < Mg < Ne < Na < F (b) Ne < Mg < K < Na < F (c) Ne < F < Mg < Na < K (d) Mg < F < Ne < Na < K (e) K < Na < Mg < F < Ne 5. What is the general relationship between electron affinity and atomic radii? (a) electron affinity becomes more negative as radii increases (b) electron affinity becomes more negative as radii decreases (c) electron affinity becomes positive as radii decreases (d) electron affinity becomes positive as radii increases (e) there is no relationship
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3 6. From the following data, what is the estimated boiling point of liquid chlorine? argon/BP = 87 K; bromine/BP = 332 K; fluorine/BP = 86 K; sulfur/BP = 718 K. (a)
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