One half of the group that make up the rare earth metals. These elements, along with actinides, were separated and placed on the bottom of the periodic table so that the table would make more sense visually; the table is still accurate if you place these elements back in where they belong. Lanthanides are shiny and reactive, and can be found on group 3 of the periodic table.
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium