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Unformatted text preview: Su, Yung Homework 3 Due: Oct 2 2007, 11:00 pm Inst: FAKHREDDINE 1 This print-out should have 35 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. Each question is worth one point. 001 (part 1 of 1) 1 points The addition of 2 electrons to a neutral atom of sulfur would produce an ion having the same ground state electronic configuration as a neutral atom of 1. Si. 2. Cl. 3. P. 4. Ar. correct 5. S. Explanation: 002 (part 1 of 1) 1 points Much research is presently directed toward the artificial production of new elements. When the element with atomic number 116 is made and characterized its properties will be most like those of the known elements in Group 1. VIA. correct 2. VIB. 3. VIIA. 4. VB. 5. VA. Explanation: 003 (part 1 of 1) 1 points The transition metals are elements with par- tially filled 1. f subshells. 2. d subshells. correct 3. p subshells. 4. s subshells. Explanation: In transition metals, d orbitals are being filled. 004 (part 1 of 1) 1 points Which of the following is a representative ele- ment? 1. V 2. All of the elements mentioned 3. None of the elements mentioned 4. Sb correct 5. Fe Explanation: Representative elements are the Group A elements. Sb is a Group VA element. 005 (part 1 of 1) 1 points Whichofthefollowingisatransitionelement? 1. P 2. Na 3. Ar 4. U 5. Pd correct Explanation: Group B elements are transition elements that are filling d orbitals. 006 (part 1 of 1) 1 points The n and quantum numbers of the last electron of an element are n = 4 and = 2 . The element is Su, Yung Homework 3 Due: Oct 2 2007, 11:00 pm Inst: FAKHREDDINE 2 1. an f-transition metal. 2. a nonmetal. 3. a d-transition metal. correct 4. a noble gas. 5. a representative element. Explanation: Where = 2, d electrons are filling. These are the transition metals. 007 (part 1 of 1) 1 points The n and quantum numbers of the last electron of an element are n = 4 and = 3. The element is 1. a nonmetal. 2. a noble gas. 3. an f-transition metal. correct 4. a d-transition metal. 5. a representative element. Explanation: Where n = 4 and = 3, 4 f electrons are filling. These are the f-transition metals. 008 (part 1 of 1) 1 points For which of the following elements would the size of the neutral atom (atomic radius) be largest? 1. Na 2. Sr 3. Rb correct 4. Ca 5. K Explanation: Atomic radii become larger as you move from right to left across a row, and also larger as you move down a column. Diagonal rela- tionships can be tricky, especially when you have to decide which of the two relationships will be the most important. Here, luckily, the comparion works well. With each successive member of a column, you are introducing a new energy level, farther and farther from the nucleus. The largest radius here would then belong to the element which sits closest to the bottom left corner of the periodic table, which is Rb in this example.is Rb in this example....
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This note was uploaded on 04/15/2009 for the course CH 54740 taught by Professor Fakhreddine during the Spring '09 term at University of Texas at Austin.
- Spring '09