[georgina_009]

Any suggested answers?

Cyclic planar systems have the following numbers of pi electrons.
Which ones are aromatic?

(I)  4        (II) 2       (III) 8        (IV) 6       (V) 10



  a. I and III   
  b. IV and V   
  c. II and IV   
  d. I and III   

[Padfoot]

IV and V   
(Aromatic - 4n+2 pi electrons)