Corroboree is the aboriginal word for a gathering or meeting. Its meaning however is much more complex. It includes not just the idea of a physical bringing together of tribes, but a meeting of minds and philosophies, of gradual growth-a gathering of momentum as the tribes arrive. virtual corroboree. Project Corroboree is, very aptly, the first project on frogs.org.au to include an online meeting-ground. In the frogs.org.au Community you can share your thoughts on the corroboree frogs and disappearing frogs with users of the site.
Except for in giant molecular substances, like diamond. Van der Waals forces or hydrogen bonds. To melt or boil a simple covalent compound you only have to overcome these two forces that hold the molecules together. You don't need to break the much stronger covalent bonds that hold the atoms together in the molecules.
2. Van der Waals is another weak force involving the interaction between the permanent diploes of two uncharged polarized bonds (dipole-dipole) or the interactions between a permanent dipole and a transient dipole induced in a neighboring molecule (instantaneous dipole-induced dipole). Dipole-Dipole interaction between two Hydrochloric Acids (HCl). Click on image for credit. In dipole-dipole interactions, both the molecules are uncharged yet polarized, meaning they are not ions with an extra or missing electron (anion or cation), rather, they are molecules with one end being more electropositive and another more electronegative.