This element is found at the center of two interlocked rings in Jean-Pierre Sauvage (“suh-VAZH’s”) first synthesized catenane. This element’s chloride regenerates the palladium catalyst in the Wacker process. This element catalyzes a cycloaddition that Barry Sharpless called the “cream of the crop” of click chemistry. This metal’s sulfate (10[1])is present in Benedict’s and Fehling’s (10[2])reagents, which are used to (10[1])detect reducing (10[1])sugars. (10[1])Lithium and this metal are found in Gilman reagents. This metal’s fully filled 3d orbitals and partially filled 4s orbital make it the (10[1])second-lightest element to violate the Aufbau principle. This metal produces a characteristic blue-green color (10[1])in a flame test. (-5[2])For 10 points, name this metal alloyed with zinc in brass, with atomic number (10[1])29 and symbol Cu. (10[1])■END■