“稀有元素”(Rare elements)常被人误会做元素周期表上的稀土元素(Rareearth elements),但是各稀有元素间,不仅彼此的物理化学性质不相类似,并且也不完全包括在一个族(Group)里。按照元素周期表的分类,应该当做稀有的元素,普通认为共有56个,列表如下: Rare elements are often misunderstood as Rareearth elements, but not between rare elements, not only with their physicochemical properties, but also not entirely within one family ( Group). In accordance with the classification of the periodic table should be used as a rare element, generally considered a total of 56, the list is as follows: