The binary molecular compound Br2O is named dibromine monoxide.
In this name, ‘di-‘ indicates that there are two bromine (Br) atoms in the compound. The prefix ‘mono-‘ is used to indicate a single oxygen (O) atom. In chemical nomenclature for binary molecular compounds, prefixes are used to specify the number of each type of atom present. Thus, the overall name reflects the composition of the compound, which consists of two bromine atoms bonded to one oxygen atom.