the alkali and alkaline-earth metal ions , mn ( ii ) , co , ni , cu ( ii ) , fe ( iii ) , al , ga , cr ( iii ) , ti ( iv ) , zr , hf , th , sc , y , la and the lanthanides are retained on the column , except for a small fraction of copper eluted with zinc and lead .
C0023031
la
C0205838
lanthanides