che2 - DrRuth says In all cases select the answer that BEST...

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Unformatted text preview: DrRuth says: In all cases, select the answer that BEST answers the question asked. The total points on this exam is 400. Read the whole thing first and plan which to answer first because you feel confident about them. Notice the hardest ones and save them till last so you don’t use up all your time working on them. Shear 52375 The table below lists electronegativity val- ues for the first six rows. The bottom row and the lanthanides and actinides list atomic weights. Just ignore them. 1 18 1A 8A 1 2 H 2 13 14 15 16 17 He 2.2 2A 3A 4A 5A 6A 7A 3 4 5 6 7 8 9 10 Li Be B C N O F Ne 1.0 1.6 2.0 2.6 3.0 3.4 4.0 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar 0.9 1.3 3B 4B 5B 6B 7B ———8B——— 1B 2B 1.6 1.9 2.2 2.6 3.2 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 0.8 1.0 1.4 1.5 1.6 1.7 1.6 1.8 1.9 1.9 1.9 1.7 1.8 2.0 2.2 2.6 3.0 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 0.8 1.0 1.2 1.3 1.6 2.2 1.9 2.3 2.2 2.2 1.9 1.7 1.8 2.0 2.1 2.1 2.7 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 0.8 0.9 1.0 1.3 1.5 2.4 1.9 2.2 2.2 2.3 2.5 2.0 2.0 2.3 2.0 2.0 2.2 87 88 89 104 105 106 107 108 109 110 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds (223) (226) (227) (261) (262) (266) (262) (277) (268) ( ) 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 140.1 141.0 144.2 145.0 150.3 152.0 157.2 158.9 162.5 164.9 167.3 168.9 173.0 175.0 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 232.0 231.0 238.0 (237) (244) (243) (247) (247) (251) (252) (257) (258) (259) (260) Version 014 – Exam 2: Shear – shear – (52375) 2 This print-out should have 34 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points When two H atoms are brought together from large distances they can make H 2 . As the bond begins to form, the force between the atoms becomes more (attractive, repulsive) and the potential energy (increases, stays the same, decreases). 1. attractive; increases 2. attractive; stays the same 3. attractive; decreases correct 4. repulsive; stays the same 5. repulsive; increases 6. repulsive; decreases Explanation: 002 10.0 points A molecule has one lone pair of electrons on the central atom and three atoms bonded to the central atom. What is its electronic ar- rangement and its hybridization? 1. pyramidal; sp 2 2. pyramidal; sp 3 3. tetrahedral; sp 2 4. trigonal planar; sp 3 5. trigonal planar; sp 2 6. angular; sp 3 7. tetrahedral; sp 3 correct Explanation: One lone pair plus 3 bonded pairs equals 4 electronic regions. This means that the central atom is tetrahedral and hybridization is sp 3 ....
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This note was uploaded on 03/31/2010 for the course CH ch302 taught by Professor F during the Spring '09 term at University of Texas-Tyler.

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che2 - DrRuth says In all cases select the answer that BEST...

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