| − | A '''transition metal''' is an element which forms at least one ion with a partially filled [Electron subshell|d subshell]]. The transition metals tend to inhabit the middle block of the periodic table and have many uses in modern industry. | + | A '''transition metal''' is an element which forms at least one ion with a partially filled [[Electron subshell|d subshell]]. The transition metals tend to inhabit the middle block of the periodic table and have many uses in modern industry. |