GENERAL CHEMISTRY CHEM 142
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This 7 page Class Notes was uploaded by Carmela Kilback on Wednesday September 9, 2015. The Class Notes belongs to CHEM 142 at University of Washington taught by Staff in Fall. Since its upload, it has received 28 views. For similar materials see /class/192581/chem-142-university-of-washington in Chemistry at University of Washington.
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Date Created: 09/09/15
Name TA name Question 1 True or False h is the Planck s constant Question 2 True or false The green color of leaves is due to the pigment chlorophyll which doesn t absorb green wavelength Question 3 We did a ame test demo last week List two of the colors that were observed Chapter 8 Electron Con guration and Chemical Periodicity 81 Development of the Periodic Table 82 Characteristics of Many Electron Atoms 83 The Quantum Mechanical Atom and the Periodic Table 84 Trends in Some Key Periodic Atomic Properties 85 The Connection Between Atomic Structure and Chemical Reactivity MendeleeV focused on chemical properties Meyer focused on physical properties But they both came up with the same way of organizing a number of elements MendeleeV went further and was able to predict the properties of several yetundiscovered elements see example of Germanium The present periodic table classify the elements according to their atomic number and not their atomic weight as was initially done by MendeleeV Marlin s lbu ur Chemistry The Molecular mmd amnmd Chang 23911 Edition Gopyrlghl ETha llaGrnw HIII campanlou Inc All rights runarm Table 81 lMendeIeey39s Predicted Properties of Germanium quoteka Siliconquot and Its Actual P 293 Properties Predicted Actual Properties of Properties of Property eka Silicon E Germanium Ge Atomic mass 7392 amu 1261 amu Appearance Gray metal Gray metal Density 55 gecm3 532 gl39cm3 Molar volume 13 cmafmol 1365 cma39fmol Speci c heat capacity 031 Jig K 032 Jig K IZ mide formula E02 Get Oxide density 47 glena 423 gram3 Sulfide formula and solubility Bhloride formula boiling point Chloride density Element preparation E52 insoluble in H20 soluble in aqueous lllHyi2 S ECI4 4100 19 gl cma Reduction of KEEFE with sodium 5352 insoluble in H20 soluble in aqueous NH4JES GeCl4 34 61 1844 g cma Reduction of KEGeF with sodium The Periodic Table of the Elements H Date of Discovery of the Elements H Be BCNOFN N AlSiP Cl K Ti V C C Ni Se Sr YZr MTcR P CIn TeIX Cs T W Ir Pt Tl P0 At Fr A M Ce Pr Nd Pm Sm Eu Gd Tb DV H0 Er Tm Yb Lu Th Pa U Np Pu AmlCm Bk Cf Es Fm Md N0 Lr B 1700 1750 B 18501900 D 16001700 B 17501800 B 19001950 B 18001850 B 19502000 I Before 1600 The Periodic Table of the Elements H Date of Discovery of the Elements H Be B N 0 FN N Al Si Cl K Ti V C 39 Se Sr YZr MTcR CIn TeIX Cs T W Tl P0 At Fr A M Ce Pr Nd Pm Sm Eu Gd Tb DV H0 Er Tm Yb Lu Th Pa U Np Pu AmlCm Bk Cf Es Fm Md N0 Lr I Before1600 17001750 18501900 I 16001700 I 17501800 19001950 I 18001850 B 1950 2000
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