key-eng-fall07-q8059x08

key-eng-fall07-q8059x08 - CHEM 2045C Quiz 8(9 Nov 07 Show...

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CHEM 2045C: Quiz 8 (9 Nov 07) NAME ________KEYS____________ N #_____________ Show your work for full credit Eng Q8059x08 The version LETTER is listed on the back of your quiz. Version A. 1. (4 pts) For Cs, Na, Li, C, and O, identify the element with the a. largest bonding atomic radius Cs b. smallest 1 st ionization energy Cs c. smallest (absolute value of) electron affinity Cs d. highest electronegativity O 2. (2 pts) For Na and Mg, which element has the higher a. 1 st ionization energy? Mg b. 2 nd ionization energy? Na (removing core electrons) 3. (1 pt) For Si and P, which element has the higher (absolute value of) electron affinity? Si (exception) 4. (2 pts) Arrange the following ions from smallest to largest ionic radii: O 2- , Na + , Al 3+ . Al 3+ < Na + < O 2- 5. (2 pts) Give the electron configurations (using condensed or noble gas notation) for the following atoms/ions. V [Ar] 4s 2 3d 3 V 2+ [Ar] 3d 3 the highest n (the 4s) electrons are removed first 6. (2 pts) Determine the number of unpaired electrons in O 2 Cr 6 Draw the orbital diagrams for O [He] 2s 2 2p 4 and Cr [Ar] 4s 1 3d 5 . 7. (2 pts) Briefly compare and contrast ionization energy and electron affinity.
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