The elements present in f-block are all metals and are placed in the two rows called lanthanide series (58Ce to 71Lu) and actinide series (90Th to 103Lr).
The lanthanides are also known as rare earth elements while the actinide elements beyond 92U are called transuranium elements.
All the transuranium elements are manmade and radioactive.
The last electron of the elements of these series is filled in the (n-2)f subshell, and therefore, these are called inner transition elements.
These elements have very similar properties within each series.