The Transition Metals
The Transition Metals are the elements found between the Group IIA Elements and the Group IIB Elements in the periodic table. The GroupIIb are sometimes considered transition elements. The transition elements are also known as the d-block elements, because while the outermost level contains at most two electrons, their next to outermost main levels have incompletely filled d sub-orbitals, which are filled-up progressively on going across the periodic table from 8to 18 electrons. The filling of the d sub-orbitals of the transition elements across a row of the periodic table is not always regular.
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