Lewis Structures and Bonding Models

In THIS video, Crash Course goes over the different types of organizing the structure that occur in chemical bonds. It is important to note that he says not all models are correct. In our class however that is not important, We must purely focus on the structure offered by the Lewis Model. HERE is another video going over the Lewis Structure. You must also understand the Geometry that he mentions when discussing tetrahedral and linear shapes. You only have to know Tetrahedral, Trigonal Planar, Linear, and Octohedral. There is also shapes that will result in polar structures, these are the Bent and Trigonal Pyramidal. In short if the central atom has a single electron or a single lone pair of electrons, its polar. HERE is a video going over how lone pairs affect shape and polarity. And here is a image showing different types of geometric shapes and the corresponding Lewis Structure:

Have a good day.