How do you tell if a bond is covalent?

Answer 1

if it occurs between non metal atoms. Covalent bonds can only occur between non metal atoms but Ionic bonds occur between metal and non metal atoms.

Answer 2

A bond is covalent if electrons are shared between atoms to form a stable molecule. Covalent bonds typically occur between nonmetals and involve the sharing of electrons to achieve a full outer electron shell. Characteristics of covalent bonds include the formation of molecules, low melting and boiling points, and poor electrical conductivity.