Question

Differentiating electron in inner transition elements enters the ________ orbital.

• A. s
• B. p
• C. d
• D. f

Answer 1

The correct option is D f

In inner transition elements, the differentiating electron enters into f orbitals. So these elements are called f-block elements.

The ‘f’ – block elements are also known by the name of inner transition elements. In these elements, the last electron usually enters the penultimate i.e. (n – 2) f of the orbital.

Option D is correct.