Double bond.... We always talk about the double bond in an alkene being an area of particularly high electron density, which induces charges on other molecules, which is what usually causes it to react. But why is this only the case for double not single? I mean, single bonds are not overly attractive since the electrons attract as much as the nuclei repel. Is the double bond different because the pi bond is that little bit further from the nucleus, due to the p orbitals orientation, and thus attract more than the nuclei repel in-coming molecule's electrons? Thanks in advance.