How do you determine if an element is a transition element?
An element's position on the periodic table determines whether it is a transition element.
The transition elements are located in groups 3-12 (IIIB-IIB), which are in the d-block. Group 3/IIIB contains the inner transition elements in periods 6 and 7. They are the lanthanides and the actinides and are in the f-block.