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EXAM chem - INTRODUCTORY CHEMISTRY CHEM 111 SPRING 2005...

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INTRODUCTORY CHEMISTRY, CHEM 111 *** SPRING 2005, TEST 2 Name: _____________________ Multiple Choice: Read each question carefully. There is only one correct answer to each question. Circle the letter corresponding to the correct answer. Avogadro’s Number = 6.022 x 10 23 , c = 2.998 x 10 8 m/sec, h = 6.626 x 10 ! 34 Joule sec 1. Which of the following wavelengths of electromagnetic radiation have photons with energy of 5.00 " 10 ! 19 J? a) 7.55 " 10 14 m b) 3.97 " 10 ! 7 m c) 2.52 " 10 6 m d) 7.00 " 10 ! 7 m e) none of these 2. Which of the following would be a resonance structure for the compound, X=Z ! X. Note that nonbonding electrons are not shown. X and Z are variables representing two different elements. 3. Arrange the following elements and ions in order of increasing first ionization energies. K, Ca 2+ , Ar, Cl !
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