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Date: 28-3-2017
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Ground state electronic configurations
d-Block metals versus transition elements The three rows of d-block metals are shown in the schematic periodic table at the beginning of the chapter. The term ‘transition elements (metals)’ is also widely used, but ‘d-block metal’ and ‘transition element’ are not interchangeable. A transition element is one for which an atom has an incompleted-subshell, or which gives rise to a cation with an incomplete d-subshell , and thus elements in group 12 (which are within the d-block) are not transition elements.
Throughout our discussions, we shall use the terms d-block and f-block metals, so being consistent with the useof the terms s-block and p-block elements in earlier chapters. Three further points should be noted: