It and a similar element's plus two oxidation states are in a d8 configuration
 and often found in square planar complexes.
One atom of this element is found in a catalyst for hydrosilylation named for Speier. One dimensional
 chains made of ions of this element are found in Magnus's green salt. With elements like potassium, this
 metal is found in Zeise's salt. Chernyaev introduced the trans effect to the chemistry of this element, which
 influences the synthesis of a particular cancer drug that crosslinks DNA. This element is present in the
 hydrogenating Adams' catalyst. It and a similar element's plus two oxidation states are in a d8 configuration
 and often found in square planar complexes. Osmium and palladium are found in this element's namesake
 group. For 10 points, name this metallic element with symbol Pt.
One atom of this element is found in a catalyst for hydrosilylation named for Speier.
{platinum}