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