Noncovalent Bonds - Video Tutorials & Practice Problems
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Noncovalent Bonds
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Video transcript
So now that we've discussed the covalent bonds in our previous lesson videos, in this video we're going to begin our lesson on non covalent bonds. And so, non covalent bonds can be defined as interactions between 2 atoms resulting from full or partial charges. Now unlike covalent bonds that we talked about in our previous lesson videos, there is absolutely no sharing of electrons in non covalent bonds and so recall from our previous lesson videos that the term covalent means sharing of electrons, but if we add the root non in front of that, then that means no sharing of electrons. And so that's an important distinction between covalent and non covalent bonds. Now, there are actually several different types of non covalent bonds that are commonly found in biology. And so down below what we have is a table of some of the different types of non covalent bonds. And so these different types of non covalent bonds are broken up into 2 groups. There are relatively strong electrostatic interactions and then there are the relatively weak Van Der Waals interactions. Now moving forward in our course, we're not going to talk much about these weak Van Der Waals interactions. This is something that you would learn more about in a chemistry course, but for our biology course, we're going to be focusing mainly on these relatively strong electrostatic interactions. And really there are 2 types of these relatively strong electrostatic interactions that we're going to talk more about moving forward and those are the ionic bonds and the hydrogen bonds. And so if we take a look at our map down below this table you'll see that the table corresponds to this map of our lesson from down below. And so notice here we have our map of the lesson on chemical bonds and we know that we've been following this map by following the leftmost branches first. So we've already discussed covalent bonds in our previous lesson videos including non polar covalent bonds and polar covalent bonds. And, moving forward we're going to focus more of our attention on the non covalent bonds, specifically on these relatively strong electrostatic interactions and so that's why we have this strong character here in this electrocution symbol. And, those are going to include the ionic bonds and the hydrogen bonds and again we'll get to talk more about each of those, types of bonds moving forward in our course. And once again, the weak Van Der Waals interactions that you see over here with this, weak guy here who can't lift this weights, this is something that we're not going to discuss much moving forward in our course. And again, you'll get to learn more about these weak Van der Waals interactions in your chemistry course. But this here concludes our brief introduction to non covalent bonds and once again we'll get to learn more about them as we move forward. So I'll see you all in our next video.
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Problem
Which of the following are considered to be very weak non-covalent chemical bonds?