第十五章硼族元素 Chapter 15 The Boron Family Elements Boron B) Aluminum(al)Gallium Ga) Indium(In) Thallium(Tl nsnp第十五章 硼族元素 Chapter 15 The Boron Family Elements Boron (B) Aluminum (Al) Gallium (Ga) Indium (In) Thallium (Tl) ns2np1