For questions about the elements of the boron family (group 13), their compounds, and their physical and chemical properties.

The boron group are the chemical elements in group 13 of the periodic table. It comprises boron ($\ce{B}$), aluminium ($\ce{Al}$), gallium ($\ce{Ga}$), indium ($\ce{In}$), thallium ($\ce{Tl}$), and perhaps also the chemically uncharacterized nihonium ($\ce{Nh}$).