|
Molecular Geometry: (SAM) 11-page, 2-day activity
This Activity Requires: Test your system to see if it meets the requirements Important! If you cannot launch anything from this database, please follow the step-by-step instructions on the software page. Please Note: Many models are linked to directly from within the database. When an activity employs our scripting language, Pedagogica, as do some of the "guided" activities, the initial download may take several minutes. Subsequent activities will not take a long time. See this page for further instructions. |
||||||||||||||
Interactive, scaffolded model
Go To Activity |
 | Overview and Learning ObjectivesThis unit focuses on how electron repulsions influence molecular shape. Both the electronic geometries and resulting molecular shapes will be discussed with emphasis on shared and unshared electron pairs as defining factors in the observed shape of a molecule. Students will be able to: • Explain that the three dimensional shape of a molecule is dependent on interactions of electrons including, repulsion to other electrons and attraction to nuclei. • Recognize linear, trigonal planar and tetrahedral molecule shapes based on areas of electron density. • Explain how both shared and unshared electrons (as represented in Lewis Dot diagrams) influence a molecule’s geometry and use this knowledge to predict the 3D shape of a molecule. • Differentiate between electron geometry and molecular geometry. • Apply their understanding of small molecule geometry to larger molecule such as fatty acids. |
|
| |
|
| |
|
| |
 | Classroom PracticeTeacher's Guide: http://sam.concord.org/publications/teacher-guides/molecular_geometry.ver6.pdf |
|
| |
|
| |
|
| |
 | Central ConceptsKey Concept: Repulsions between electron pairs around a central atom work to distribute the electrons and determine the geometry of a molecule. Additional Related ConceptsPhysics/Chemistry
|
|
| |
|
| |
|
| |
 | Extensions and ConnectionsFermi Lab's ARISE Project suggests the following enhancement to this SAM unit: http://www.concord.org/~barbara/SAM/ARISE/ARISE_SAM_molecular_geometry.pdf |
|
| |
|
| |
|
| |
 | Activity CreditsCreated by CC Project: SAM using Molecular Workbench |
|
| |
|
| |
|
| |
