What are inner transition elements?
Inner Transition elements: These are the f-block elements placed below the periodic table but they belong to 6 and 7 group within the transition series.The electronic configuration of inner transition elements is: (n-2) f 0-14(n-1) d 0-2 ns 2.These are divided into two series: Lanthanides (atomic numbers 58-71) and actinides(atomic numbers 90-103).