Why D Block Elements called Transition Elements ?

The d block of the periodic table is made up of elements from groups 3 to 12. We are going to see why d block elements are also known as transition elements.
D-blocktransition elements
D-block elements are those that have an incompletely filled d-subshell in their lowest energy state or most stable oxidation state.
They are also known as transition elements.
The (n-1) d subshell is included in the partially filled subshells.
In the farthest shell, all d-block elements have about the same number of electrons.
As a result, they have similar chemical properties.

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