過渡金屬

一組#金屬#元素，包括#銅 同#金；當#氫#原子 同佢嘅原子之一形成#化合物 嘅時候，呢種金屬所顯示嘅氫原子價數超過一個 ((chemistry) transition metal; any of a group of metal chemical elements including copper and gold that show more than one valency, the number of hydrogen atoms that can combine with one of its atoms to form a compound)

transition metal; transition element