notes_162_Exp_5_Notes_110706

notes_162_Exp_5_Notes_110706 - EXPERIMENT 5 PART I:...

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EXPERIMENT 5 PART I: PERIODIC TRENDS, A COMPUTER STUDY & INTRODUCTION TO CHEMDRAW PART II: ACID-BASE PROPERTIES OF PERIOD 3 AND GROUP 5A ELEMENTAL OXIDES PART III: OXIDIZING ABILITY OF THE ELEMENTAL HALIDES
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PERIODIC TRENDS I. A Computer Study There are many more periodic properties than are covered in your textbook. The computer program “KC Discoverer” allows you to plot and examine additional periodic and group trends. Only Study Center PC computers have this program. Do this pre-lab well in advance of its due date.
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0 20 40 60 80 100 120 140 160 180 200 0 2 04 06 08 0 1 0 0 Atomic Number Melting Point (oC) Example of Periodic Trends using KC Discoverer Melting point of Group 1A elements
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0 5 10 15 20 25 0 5 10 15 20 Group Number Density (g/cm3) Example of Periodic Trends using KC Discoverer Density of Period 4 and Period 6 Elements
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Purpose The program “KC? Discoverer” has a database of the properties of the elements. Our goal is to: 1) Learn how to access desired information from the database. 2) Use the program to plot graphs that will enable us to easily establish group or period trends. 3) Explain the periodic or group trend. The database consists of the following properties: atomic number discovery year state (l,g,s) atomic weight number of isotopes structure (unit cell) density 1st Ionization energy source hardness (Mohs) 2nd Ionization Energy uses melting point 3rd Ionization Energy color enthalpy of fusion electron affinity toxicity enthalpy of vaporization electronegativity carcinogenicity heat of atomization atomic volume reaction: air thermal conductivity ionic radius (+1)
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notes_162_Exp_5_Notes_110706 - EXPERIMENT 5 PART I:...

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