 In this video, we're going to learn to use VSEPR theory to predict the shapes of some molecules. Remember that the key feature of VSEPR is that it says that bonding electron pairs and lone pairs repel, so the molecule will try to arrange itself so that the electrons are as far apart as possible. To explore this, I'm going to work through three examples of basic molecular shapes. For each one, we'll look at a specific molecule, and I'll first get you to draw the Lewis structure, so have a pen and paper handy. I'll then get you to pause the video and think about how the bonds in that molecule could arrange themselves to minimize the repulsion between the electrons in neighboring bonds. In other words, what's the best shape for this molecule so that the bonds are as far apart as possible? Let's start with carbon dioxide. First, pause the video and draw the Lewis structure for this molecule. Remember to tally up the valence electrons in all the atoms first.