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

Explanation

The f-block elements, in which the last electron 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.