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Unformatted text preview: Version 001 Quiz 2 sparks (50990) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. ChemPrin3e T01 54 001 1.0 points Which of the following has the smallest atomic radius? 1. Al 2. S 3. P 4. Si 5. Cl correct Explanation: As you move down the periodic table atomic radius increases because the shielding effects of inner electrons reduces the effective nuclear charge experienced by outer shell elec- trons. As you move across the periodic table the radius decreases because electrons are be- ing added to the same electronic shell (and thus do not add additional shielding effects) while the number of protons increases. Msci 06 0212 002 1.0 points Due to the screening effect, the 3 s electrons of magnesium (Mg) feel an effective nuclear charge (Z eff ) of 1. +12 2.- 2 3. +4 4. +2 correct 5. +1 Explanation: The two 3 s electrons are partially shielded from the 12 protons in the nucleus by the 10...
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This note was uploaded on 11/05/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.
- Fall '07