Final answer:
Covalent compounds are formed when nonmetallic elements combine via covalent bonds, resulting in the formation of molecules.
Step-by-step explanation:
Covalent compounds, also known as molecular compounds, are formed when atoms of two or more different nonmetallic elements combine via covalent bonds.
These bonds are formed when atoms share valence electrons.
The resulting compound is composed of molecules, which are the smallest particles of a covalent compound that still exhibit its properties.