Question

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 1

Inner transition metals are those elements in which the last electron enters the f-orbital. The elements in which the 4f and the 5f orbitals are progressively filled are called f-block elements. Among the given atomic numbers, the atomic numbers of the inner transition elements are 59, 95, and 102.