[dexwiz]

Correct. OChem represents a shift from atom based thinking to electron arrangement based thinking. You kind of learn this before with orbitals and simple stuff like Cl's 7 electrons+ H's 1 electron = 8 electrons, a full shell! That is why halogens make great acids. But this is only the simplest form.

OChem is much more about how electrons move during reactions. Carbon, oxygen, and hydrogen are simple atoms, but their electrons can be arranged in so many ways. Concepts like electrophilic and nucleophilic are introduced to help model these interactions. You can memorize OChem reactions based on atoms, but its much easier to comprehend once you start looking the electrons in the bonds as the important bit and atoms are just a place to put them.