Organic compounds can be classified based on their composition. Hydrocarbons are organic compounds composed of only carbon and hydrogen, forming the backbone of more complex organic molecules. They are divided into aliphatic and aromatic hydrocarbons depending on whether their carbon atoms are arranged in open chains or closed ring structures.

1. Classification of organic compounds.
By: Mohamed Ahmed
Third year, Biochemistry Department

2. Hydrocarbons
• It is the backbone of organic compounds.
• Organic compounds are mainly composed of
carbon(C) and hydrogen(H).
• Definition: they are organic compounds consist of
carbon and hydrogen.

3. Classification scheme: