Tetravalence videos

Freshman Organic Chemistry (CHEM 125) Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involving atomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valence structures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, and molecular models closely related to those in use today. Complete course materials are available at the Open Yale Courses website: open.yale. ...

automobile, you have yttria-stabilized zirconia acting as the sensor. And, we can use some group four. Group four we could use lead oxide. We'll see an example of that. Or, you could use tin oxide. This is the divalent oxide, and this is the tetravalent oxide of tin. So, these are all oxide donors, and you will see various combinations of these added to glasses in order to achieve the kind of chain scission that we are looking for. And here's some really interesting data. This is XPS data. ...