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Unformatted text preview: Version Exam 1 Sutcliffe 1 This print-out should have 30 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which of the following groups of atoms is correctly arranged in order of decreasing first ionization energy? 1. Ge > As > Se 2. Cl > Br > I correct 3. Rb > K > Na 4. In > Ge > P Explanation: First ionization energy increases as one moves from left to right on a given row and increases from bottom to top as one moves up a given family. 002 10.0 points Choose the pair of names and formulae that do not match. 1. SCl 4 : sulfur tetrachloride 2. N 2 O 3 : dinitrogen trioxide 3. KNO 3 : potassium nitrate 4. MgSO 4 : magnesium sulfate 5. SnCl 4 : tin(V) chloride correct Explanation: 003 10.0 points Note: you can find helpful conversions on the back of the scantron we provide you. A pipe drips at 155 mL/min. Express this is units of gallons/day. 1. 2.34 gal/day 2. 0.223 gal/day 3. 15.7 gal/day 4. 223 gal/day 5. 58.9 gal/day correct 6. 942 gal/day 7. 377 gal/day Explanation: ? gal day = 155 mL min 1 L 1000 mL 1 gal 3 . 785 L 60 min 1 hr 24 hr 1 day = 58 . 9 gal day 004 10.0 points The following three statements refer to the Bohr theory of the atom. Z1) An electron can remain in a particular orbit as long as it continually absorbs radiation of a definite frequency. Z2) The lowest energy orbits are those closest to the nucleus. Z3) An electron can jump from an inner orbit to an outer orbit by emitting radiation of a definite frequency. Which response contains all the statements that are consistent with the Bohr theory of the atom and no others? 1. Z2 and Z3 only 2. Z3 only 3. Z1 and Z2 only 4. Z1, Z2 and Z3 5. Z2 only correct Explanation: 005 10.0 points In an atom the maximum number of electrons having the quantum numbers n = 6 and = 3 is 1. 72. Version Exam 1 Sutcliffe 2 2. 14. correct 3. 6. 4. 10. 5. 7. Explanation: 14 electrons can have this set of quantum numbers. Where = 3, seven values of m are possible, namely, 3, 2, 1, 0,- 1,- 2, and- 3. Each one of these m values represents a single orbital, so there are 7 orbitals. Since each orbital can accomodate 2 electrons, 14 electrons can have this set of n and values. 006 10.0 points Chromium and manganese both have five 3 d electrons. 1. False; chromium has four 3 d electrons, but manganese has five 3 d electrons. 2. True; one of the 4 s electrons from chromium prefers to move to a 3 d orbital to form a half-filled d shell. correct 3. False; chromium has five 3 d electrons, but manganese has six 3 d electrons. 4. True; one of the 3 d electrons from man- ganese prefers to move up to a 4 s orbital to form a filled s shell....
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- Spring '07