Thulium, The rarest of the lanthanide group; it is used as a source of X-rays in portable radiology equipment and in the manufacture of ferrites .Thulium
Europium, The most reactive metal of the lanthanide group; it is used especially in television screens and nuclear reactors .EuropiumMetal
Cerium, The most common metal of the lanthanide group and the main constituent of flint alloys .Cerium
Thulium, The rarest of the lanthanide group; it is used as a source of X-rays in portable radiology equipment and in the manufacture of ferrites .Thulium
Europium, The most reactive metal of the lanthanide group; it is used especially in television screens and nuclear reactors .Europium
Cerium, The most common metal of the lanthanide group and the main constituent of flint alloys .Cerium
