f-block elements are called inner transition elements because
a- they have properties similar to those to transition elements
b- they have been taken out of the transition elements
c- the last electron enters into the f-orbitals of the penultimate shell
d- the last electron enters into to f-orbitals of the ante-penultimate shell
The correct option is d. i.e. the last electron enters into to f-orbitals of the ante-penultimate shell
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/why-are-f-block-elements-called-inner-transition-elements/classification-of-elements-and-periodicity-in-properties/2649773
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/why-are-f-block-elements-called-inner-transition-elements/classification-of-elements-and-periodicity-in-properties/2649773