Editing Meitnerium (section)

===Chemical===
Meitnerium is the seventh member of the 6d series of [[transition metals]], and should be much like the [[platinum group metal]]s.<ref name="DoiX" /> Calculations on its [[ionization potential]]s and [[atomic radius|atomic]] and [[ionic radius|ionic radii]] are similar to that of its lighter homologue [[iridium]], thus implying that meitnerium's basic properties will resemble those of the other [[group 9 element]]s, [[cobalt]], [[rhodium]], and iridium.<ref name="Haire" />

Prediction of the probable chemical properties of meitnerium has not received much attention recently. Meitnerium is expected to be a [[noble metal]]. The [[standard electrode potential]] for the Mt<sup>3+</sup>/Mt couple is expected to be 0.8&nbsp;V. Based on the most stable oxidation states of the lighter group 9 elements, the most stable oxidation states of meitnerium are predicted to be the +6, +3, and +1 states, with the +3 state being the most stable in [[aqueous solution]]s. In comparison, rhodium and iridium show a maximum oxidation state of +6, while the most stable states are +4 and +3 for iridium and +3 for rhodium.<ref name="Haire" /> The oxidation state +9, represented only by iridium in [IrO<sub>4</sub>]<sup>+</sup>, might be possible for its congener meitnerium in the nonafluoride (MtF<sub>9</sub>) and the [MtO<sub>4</sub>]<sup>+</sup> cation, although [IrO<sub>4</sub>]<sup>+</sup> is expected to be more stable than these meitnerium compounds.<ref name="Mt(IX)" /> The tetrahalides of meitnerium have also been predicted to have similar stabilities to those of iridium, thus also allowing a stable +4 state.<ref name="MtX4" /> It is further expected that the maximum oxidation states of elements from bohrium (element 107) to [[darmstadtium]] (element 110) may be stable in the gas phase but not in aqueous solution.<ref name="Haire" />