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Learn about the d - block elements , also known as transition metals, and their electron configuration, properties and oxidation states. Explore the four series of d - block elements from 3d to 6d and their exceptions, trends and applications. The d- Block Elements d block elements are those that have electrons (1 to 10) in the d -orbital of the penultimate energy level and in the outermost orbital (1-2). Despite the fact that electrons do not fill the ' d ' orbital in group 12 metals, their chemistry is comparable to that of the preceding groups in many aspects, and they are thus classified as d block elements . This block corresponds to groups 3 to 12 in the periodic table. d block elements are often also called transition metals but according to IUPAC, transition metals are those elements that have an incomplete d subshell or elements that can form a cation with an incomplete d-subshell. Peripheral shell configuration ns2 means. d-block elements have the following characteristics: Electronic Configuration of d-block elements (n–1)d1-10ns1–2 is the most common electrical configuration of d-block components. Half-filled and full-filled d orbitals are both stable for these elements .
