Group 13 Elements

#	Symbol	Name	Atomic Mass	Category
5	B	Boron	10.81	Metalloids
13	Al	Aluminium	26.982	Post-Transition Metals
31	Ga	Gallium	69.723	Post-Transition Metals
49	In	Indium	114.818	Post-Transition Metals
81	Tl	Thallium	204.38	Post-Transition Metals
113	Nh	Nihonium	286	Post-Transition Metals

6 elements