MnBr3 is not a single element that you would find on the periodic table. It's a chemical compound, made up of two elements:

* Mn (Manganese): This is a transition metal found in Group 7 (VIIb) and Period 4 of the periodic table.

* Br (Bromine): This is a halogen found in Group 17 (VIIa) and Period 4 of the periodic table.

The periodic table only lists individual elements, not compounds.