Organic and inorganic compounds.. Carbon atoms, hydrogen, oxygen and nitrogen. Carbohydrates, Lipides, Proteins, Nucleic acids

Organic compounds:
Carbon and hydrogen atoms contain mainly carbon and hydrogen atoms and may contain other elements such as oxygen and nitrogen.
Such as: carbohydrates, lipids, proteins, nucleic acids.

Inorganic compounds:
Carbon atoms are not required.
Such as: water, many mineral salts.