* Elemental bromine exists as a diatomic molecule (Br₂). This means two bromine atoms are bonded together.
* Average atomic mass is calculated based on the relative abundance of all isotopes of an element. It represents the average mass of a single atom of that element.
* Average molecular mass is calculated based on the average atomic masses of all atoms in the molecule.
Therefore, the average mass of elemental bromine (Br₂) is twice the average atomic mass of bromine (Br).
To get the atomic mass of bromine, you need to use the standard atomic mass from the periodic table.
For example, the average atomic mass of bromine is 79.904 u. This is the value you should use for calculations involving a single bromine atom.
