Propylene, C₃H₆, is a gas that is used to form the important polymer called polypropylene. Its Lewis structure is (a) What is the total number of valence electrons in the propylene molecule?

Video transcript

Hey everyone, welcome back. Let's go ahead and calculate the total number of valence electrons will have in the following lewis structure. What we can do is we can take the number of atoms we have of each element and multiply it by the corresponding number of valence electrons they contribute. So for example looking at carbon, we have two of carbon and we're going to multiply two Times four Since carbon is in our group for a and it contributes four valence electrons per atom. So this will get us to eight. Now looking at hydrogen, we have two of hydrogen and we're going to multiply that By one valence electron Since Hydrogen is in our group one a. So this will get us to two valence electrons. And lastly looking at our chlorine, we have four of chlorine and we're going to multiply this by seven since chlorine is in our group seven a. So this will get us to 28, adding this all up. We end up with a total of 38 valence electrons. So our answer here is going to be answer choice C. So I hope this made sense. And let us know if you have any questions