Chemistry
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There is extensive documentation for the lab, including an instruction video.
IrYdium - Virtual Online Chemistry Lab
Visual Chemistry : Alkali Earth Metals:
All of the Group 2 elements have two electrons in the outer shell.
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UC Berkeley Webcasts | Video and Podcasts: Chemistry 1A
Audio Book
The following links take you to PowerPoint-like presentations that include an audio narration of each section of the chemistry-first version of An Introduction to Chemistry by Mark Bishop.
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