Lanthanide Series Periodic Table. These elements are often referred to as both the rare earth metals as well as the. The lanthanides are a series of chemicals in the expanded periodic table that have an expanded number of orbitals beyond that of the transition metals.
One of those rows is called the lanthanide series. The lanthanides are located in block 5 d of the periodic table. There are a bunch of names you may hear that describe these 15 elements.