Question

What are transition elements?

Answer 1

A transition element is an element whose d-block is never fully filled in its atomic state as well as in its ionic state .

Explanation:

• Elements of Group 3-11 are all transition elements.

Answer 2

The elements in the center of the periodic table

Explanation:

They are the elements towards the middle of the periodic table.

They are separated from the rest of the elements because their valence electrons are in both the `"4s"` and `"3d"` subshells.

Transition elements are more strictly defined as elements whose atoms have an incomplete `"d"` sub-shell.

This definition excludes elements in Group 12, as they have full `"d"^10` configurations.

Thus, `"Zn, Cd, Hg"`, and probably `"Cn"` are not transition elements even though they are in the `"d"`-block.