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Chemistry LibreTexts

7: Experiment 7 - Molecular Structure

  • Page ID
    214684
  • Ancillary Documents

    Learning Objectives

    Content:

    • Lewis dot structure
    • Resonance structure
    • VSEPR model
    • Resonance
    • Polarity
    • Formal charge
    • Dipole

    Process:

    • Group assignment: Lewis Dot Structure Lab Report
    • Group Assignment: VSEPR Worksheet
    • Group Assignment: VSEPR Lab Report

    Prior Knowledge: 

    Molecular compounds are formed when two non-metals share valence electrons forming a covalent bond.  This results in two types of orbitals; bonding orbitals, where the valence electrons are shared between two nuclei, and non-bonding orbitals (lone pairs), where the valence electrons are localized to one nucleus.  Molecules have definite geometric shapes which influence their chemical properties and behavior.  The first step in understanding a molecule's geometry is in determining the connectivity of the atoms, and the types of orbitals each atom possesses.  This can be conveniently done with Lewis dot structures, which account for all valence electrons by using lines between atoms to represent bonding electron pairs and dots to represent lone electrons.

     

    Procedure

    June 17, 2020

    Using the PHET simulation below to complete the Lab Report. This is a group assignment.

     

    Interactive Element

    June 18, 2020

    Use PhET Simulation (see link below) to build electronic orbital models. Take screenshots and insert them in the table. Name the electron geometry. Use snipping tool or take a screenshot and insert in the table. Resize as needed. Use ONLY lone pairs.

    Interactive Element

    VSEPR Lab Report is a group assignment. Make sure every member of your group participates!

    Interactive Element

    Test Yourself

    Query \(\PageIndex{1}\)

     

    Contributors and Attributions

    Robert E. Belford (University of Arkansas Little Rock; Department of Chemistry). The breadth, depth and veracity of this work is the responsibility of Robert E. Belford, rebelford@ualr.edu. You should contact him if you have any concerns. This material has both original contributions, and content built upon prior contributions of the LibreTexts Community and other resources, including but not limited to:

    • Elena Lisitsyna

     

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