Copper wire generally refers to the copper wire drawn by solid copper according to its ductility, in which there are only physical changes, so it is pure.
Copper wire: it is usually drawn from hot-rolled copper bar without annealing (but the smaller wire may require intermediate annealing). It can be used for weaving mesh, cable, copper brush filter screen, etc.
Copper wire is divided into: brass wire (containing 65% copper and 35% zinc), purple copper wire (containing 99.8% pure copper) and phosphorus copper wire (containing 85% - 90% copper and 5% - 15% tin). The mixture is called the mixture. For example, salt water is the mixture of salt and water. A pure substance is just a substance. There is no chemical formula for the mixture. A pure substance has a chemical formula. PS: ice water mixture is also pure, because it is water H2O. （TongSiShiChunJingWuHaiShiHunGeWu）