Final answer:
The full structure of caffeine can be described using its Lewis structure, which represents the bonding and lone pairs of electrons in the molecule.
Step-by-step explanation:
The full structure of caffeine can be described using its Lewis structure. In the Lewis structure, each atom is represented by its chemical symbol, and the bonding electron pairs are shown as lines (bonds) between the atoms. The lone pairs of electrons are represented by pairs of dots around each atom. In the case of caffeine, the chemical formula is C8H10N4O2. The Lewis structure of caffeine consists of a central carbon atom bonded to three other carbon atoms, two nitrogen atoms, and one oxygen atom. Each carbon atom is also bonded to hydrogen atoms. The lone pairs of electrons are located on the nitrogen and oxygen atoms.