. . "Copper products" . . . . "the mineral copper" . "Hammered copper" . . . "copper metal" . . . . . "chemical element" . . . . . . . . . . . . . . . . . . . . "copper smelting company" . "Cu2" . . "that mineral" . . . . . . "Cu(I)" . . . . . "gilded copper" . . . . . . . . . "Copper#Recycling" . . . . . . . . . . . . . . . . . . . . . . . . . "copper production" . . . . . . . . . . . . . . . . . . . . . . . "copper#Compounds" . . . . . . . . . . . . . . . . . . . . "copper concentrate" . . . . . . . . . . . . . . . "Copper alloys" . . . . . . "copper-rich" . . . . . . . . . . . . . . . . . . . "copper can be recycled without loss" . . . . . . . . . . . . . . "Copper#Applications" . . . . . . . . . . . . "copper(II" . . . . . . . . . . . . . . . . . . . "copper matte" . . . . . . . . . . . . . . . . "Cupric" . . . . . . . . . . . . "Cu(II)" . . "Cu2+" . . . . . . . . . . . . . . . . . . "Copper/" . . . . . . . . . . . . . . . "Copper#Folk medicine" . . . . . . . . . "copper roofs" . . . . . . "sulfurous copper ore" . . . . . . . . . . . . . . . . . . . . "Copper" . . . . . . . . . . . . . . . . . . . . . "smelted copper" . "serum copper" . . . . "Cu29" . . . . . . . . . . "Copper ore" . . . . . . . . . . . . . . . "copper utensils" . . . "Refined Copper" . "copper smelter" . . . . . . "copper complexes" . . . . . . "copper" . . . . . . . . . . . . . . . . . . . "copper(II) complex" . . . . "Middle East" . "Copper Statue" . . . . . . . . . . . "elemental Cu" . "Cu(111)" . . . . . . . . . . . . . . . . . "Copper wires" . . . "alchemical symbol for copper" . . "cupric" . . . . . . . . . "Co" . . . . . . "copper ore" . . . . . . . . . . . . . . "copper ions" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "copper2+" . . . . . . "Gilded Copper" . . "Cu(I) and Cu(II)" . . . . . . . "Cu+" . . . . . . . . . . . . . . "Copper(II)" . . . . . "copper plate" . . . . . "'''C'''opper" . . . . . . "copper (Cu)" . . . . . . . . . "C" . . "Copper (Cu)" . . . . "copper metallurgy" . . . . . . . . "29Cu" . . . . . "copper(I)" . . . . . . . . . . . . . . . . . . . . . . . "Copper" . . . . . "Copper bars" . . . . . . . . . . . . . . . . . "copper trade" . . . . . . . . "Cu" . . . "copper cathodes" . . . . . "Copper#Biological_role" . . . . "number of functions" . . . . . . . . . . . . . . "copper(II)" . . . . . . . . . . . . . . . . . . . . . . . . . . . . "essential for life" . . . . . "Yes" . . . . . "cupreous" .