q2pf09key - CH301 Fall 2009 Practice Quiz 2 Answer Key 1....

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CH301 Fall 2009 Practice Quiz 2 Answer Key 1. What is the ground state electron configuration for silver (Ag) ? a. [Kr]4d 10 5s 1 b. [Kr]5s 2 4d 9 c. [Kr]5s 2 5d 9 d. [Kr]3d 9 4s 1 Certain members of the d-transition metals can "borrow" nearby s electrons in order to half- fill or fill their d subshell. 2. Calculate the effective nuclear charge experienced by the valence electrons in a neutral germanium (Ge) atom. a. 14 b. 4 c. 2 d. 10 Valence electrons are those contained within the outermost energy level. To calculate effective nuclear charge the number of shielding electrons (all electrons in lower energy levels) are subtracted from the actual nuclear charge (number of protons in the nucleus). 32 - 28 = 4 3. Arrange the following atoms in order of increasing electron affinity: Na, N, Cl, Cu a. Cu < Cl < Na < N b. Na < Cu < N < Cl c. Cl < Cu < Na < N d. N < Na < Cu < Cl In general, electron affinity follows the same trend as ENC. Nitrogen however has the lowest affinity because it has a half filled p subshell, which results in extra stability. Therefore it will
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This note was uploaded on 09/12/2010 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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q2pf09key - CH301 Fall 2009 Practice Quiz 2 Answer Key 1....

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