| − | {{Element | name=Actinium | symbol=Ac | anumber=89 | amass=227.0 amu | noe=89 | class=Transition Metal | cstructure=Cubic | color=Silver | date=1899 | discname=[[Andre Debierne]] | origname=From the Greek ''aktinos''. | uses=Unknown | obtained=Unknown, as it is extremely rare. }} | + | {{Element | name=Actinium | symbol=Ac | anumber=89 | amass=227.0 amu | noe=89 | class=Transition Metal | cstructure=Cubic | color=Silver | date=1899 | discname=André-Louis Debierne | origname=From the Greek ''aktinos''. | uses=Unknown | obtained=Unknown, as it is extremely rare. }} |