33+ Actinide Series Examples. Several plutonium isotopes exist, all of which are radioactive. As is common in the actinide series pu has a variable oxidation state and occurs in complex variable geometries in crystal structures.
All of these elements, except actinium, thorium, protactinium and uranium are only made artificially and are not found in nature.
The lanthanide series includes elements 58 to 71, which fill their 4f sublevel progressively. Some examples of an actininide element on the peridic table are thorium, lawrencium are actinides. Analogous to the lanthanide contraction. A series of 15 radioactive elements with increasing atomic numbers from actinium to.