The formula for selenium monoxide is SeO.
In terms of its bond type, selenium monoxide is primarily considered a covalent compound. This is because both selenium and oxygen are nonmetals, and they share electrons to form covalent bonds instead of transferring electrons, which would form an ionic bond. In covalent compounds, atoms achieve stability by sharing their valence electrons, resulting in the formation of molecules. In the case of selenium monoxide, one selenium atom shares electrons with one oxygen atom to create a stable molecular structure.