Figure 1
Shown below is the structure of caffeine in the centre and two different resonance states I and II with lone pairs and formal charges omitted.
-Referring to Figure 1,how many lone pairs of electrons can be found on the nitrogen atom at F?

Question

Figure 1
Shown below is the structure of caffeine in the centre and two different resonance states I and II with lone pairs and formal charges omitted. 
-Referring to Figure 1,how many lone pairs of electrons can be found on the nitrogen atom at F?

Quizplus · Accepted Answer

Nitrogen has five valence electrons. In a typical bonding scenario, three of these electrons are used for bonding, leaving two electrons that form a lone pair.

Figure 1 Shown Below Is the Structure of Caffeine in the Centre