What are molecular compounds usually composed of?

Molecular compound consists of individual molecules that contain only covalent bonds. The covalent bonds within the molecules are very strong and highly directional, so the molecules usually have definite shapes and retain their identities during physical changes. The forces between the molecules are by comparison very weak. It's these weak intermolecular forces that determine many of the properties of covalent molecular compounds.

Molecular compounds are typically composed of non-metal elements bonded together through covalent bonds. These bonds involve the sharing of electrons between atoms to achieve stable electron configurations. Molecular compounds can range from simple diatomic molecules like hydrogen (H2) and oxygen (O2) to more complex structures containing multiple atoms of different elements, such as water (H2O) and carbon dioxide (CO2).