Find out total number of compounds which are more stable in its ionic form

A molecule is said to be aromatic if the following conditions are satisfied.

• An aromatic molecule must be cyclic.
• An aromatic molecule must be planar.
• An aromatic ring must contain only sp2-hybridized atoms that can form a delocalised system of π molecular orbitals.
• The number of π electrons in the delocalised π system must equal 4n + 2, where n is an integer.
• The “4n + 2 rule” was proposed by E. Huckel, and is known as the Hückel rule 

Aromatic compounds are more stable  compounds among the conjugated compounds.