What are inner transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner transition elements : 29, 59, 74, 95, 102, 104.

Answer

The f-block element , in which the last electrons enters into f-subshell are called inner transition elements. These include lanthanoids (58-71) and actinoids(90-103). Thus elements with atomic numbers 59,95` and `102` are inner transition elements.