D-block (for diffuse) elements consist of the transition metals (group 3-12 on the periodic table) in which the outermost electron shell is the D orbital. D-block elements form at least one stable ion with an incompletely filled electron subshell.
... at Deventer
conducted by the Brethren of the Common Life[?].
He became skilful as a copyist and was thus
enabled to support himself. Later he was admitted
to the ...