Copper yog cov khoom siv tshuaj lom neeg nrog cov cim tshuaj Cu (los ntawm Latin: cuprum) thiab atomic tooj 29. ntshiab tooj liab yog cov hlau mos, nrog cov xim liab-txiv kab ntxwv nto nrog cov xim hlau sheen thaum nws yog freshly txiav, zoo ductility, siab thermal thiab hluav taws xob conductivity, thiab yog li ntawd cov khoom siv feem ntau siv hauv cov cables thiab cov khoom siv hluav taws xob thiab hluav taws xob, thiab tseem tuaj yeem siv los ua cov khoom siv hauv tsev, nrog rau kev ua kom muaj ntau cov alloys. Copper alloys muaj cov cuab yeej zoo heev thiab tsis muaj hluav taws xob tiv thaiv, qhov tseem ceeb tshaj plaws yog tooj liab thiab tooj dag. Tsis tas li ntawd, tooj liab yog cov hlau ruaj khov uas tuaj yeem siv tau ntau zaus yam tsis tau poob nws cov khoom siv kho tshuab. Tooj liab thiab nws cov alloys tau siv los ntawm tib neeg rau ntau txhiab xyoo. Thaum lub sij hawm Roman lub sij hawm tooj liab feem ntau yog mined nyob rau hauv Cyprus, yog li thawj lub npe cyprium (lub ntsiab lus hlau ntawm Cyprus), uas tom qab los ua cuprum, uas yog lub hauv paus ntawm lus Askiv: tooj liab, lo lus Fabkis: cuivre, thiab lo lus German: Kupfer. Divalent tooj liab ntsev yog cov tooj liab sib txuas, feem ntau xiav los yog ntsuab xim, thiab yog cov xim ntawm cov zaub mov xws li xiav chalcopyrite thiab turquoise, uas tau siv dav los ua pigments thoob plaws hauv keeb kwm. Copper ntsuab (tooj liab alkali carbonate) yog tsim thaum tooj liab architectural lug raug corroded. Cov khoom siv kho kom zoo nkauj feem ntau yog siv cov hlau tooj liab thiab tooj liab uas muaj cov xim. Tooj liab yog ib qho tseem ceeb ntawm kev noj haus cov zaub mov rau tag nrho cov kab mob nyob, vim nws yog ib qho tseem ceeb ntawm cov pa enzyme complex cytochrome c oxidase. Mollusks thiab crustaceans muaj tooj liab nyob rau hauv cov ntshav pigment hemocyanin. Hauv cov ntses thiab lwm yam tsiaj, cov ntshav yog hemoglobin, uas muaj cov hlau. Tooj liab muaj nyob rau hauv tib neeg lub cev feem ntau nyob rau hauv daim siab, nqaij thiab pob txha. Copper compounds yog siv los ua cov kab mob bacteriostatic, fungicides thiab ntoo preservatives.
Txawm koj xav taucov kav dej tooj liab, tooj liab rods ,tooj liab daim hlau, peb muaj cov khoom thiab kev txawj ntse kom tau raws li koj xav tau.
