<http://schema.org/description>
"The d-block elements are found in groups 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 of the periodic table. The D block elements are also known as the transition metals. The d orbital is filled with the electronic shell \u201Cn-1.\u201D There is a maximum of ten electrons that can occupy the d orbital."^^<http://www.w3.org/2001/XMLSchema#string>
<http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Descriptive_Chemistry/Elements_Organized_by_Block/3_d-Block_Elements>