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 , i.e., in which the last electron enters into f-subshells 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.