7: Experiment 7 - Molecular Structure
- Page ID
- 214684
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- MS Word PDF VSEPR Handout
- MS Word PDF Google Doc Lewis Dot Structure Lab Report
- MS Word PDF Google Doc VSEPR Worksheet
- MS Word PDF Google Doc VSEPR Lab Report
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