The d block elements, also known as transition elements, are located in the middle of the periodic table, between groups 2 and 13.
They are characterized by having partially filled d orbitals in their outermost shells.
Most of the d block elements are metals, although there are some metalloids and nonmetals.
They are generally harder, denser, and have higher melting points than the s and p block elements.
They are also more reactive than the s and p block elements.
Many d block elements are used in the industry due to their unique properties, such as their high conductivity, catalytic behaviour, and magnetic properties.