Copper
Chemical element with the symbol Cu and atomic number 29.
- Copper500 related topics
Bronze
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminum, manganese, nickel or zinc) and sometimes non-metals, such as phosphorus, or metalloids such as arsenic, or silicon.
Alloy
Mixture of chemical elements of which at least one is a metal.
Mixture of chemical elements of which at least one is a metal.
Examples of alloys include red gold (gold and copper) white gold (gold and silver), sterling silver (silver and copper), steel or silicon steel (iron with non-metallic carbon or silicon respectively), solder, brass, pewter, duralumin, bronze, and amalgams.
Chemical element
A chemical element refers to all aspects of the species of atoms that have a certain number of protons in their nuclei, including the pure substance consisting only of that species.
A chemical element refers to all aspects of the species of atoms that have a certain number of protons in their nuclei, including the pure substance consisting only of that species.
The history of the discovery and use of the elements began with primitive human societies that discovered native minerals like carbon, sulfur, copper and gold (though the concept of a chemical element was not yet understood).
Patina
Patina ( or ) is a thin layer that variously forms on the surface of copper, brass, bronze and similar metals (tarnish produced by oxidation or other chemical processes), or certain stones, and wooden furniture (sheen produced by age, wear, and polishing), or any similar acquired change of a surface through age and exposure.
Thermal conductivity
Measure of its ability to conduct heat.
Measure of its ability to conduct heat.
For example, under standard conditions the thermal conductivity of copper is over 10,000 times that of air.
Turquoise
Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O.
Tin
Chemical element with the symbol Sn and atomic number 50.
Chemical element with the symbol Sn and atomic number 50.
The first tin alloy used on a large scale was bronze, made of 1⁄8 tin and 7⁄8 copper, from as early as 3000 BC. After 600 BC, pure metallic tin was produced.
Electrical resistivity and conductivity
Fundamental property of a material that measures how strongly it resists electric current.
Fundamental property of a material that measures how strongly it resists electric current.
In normal (that is, non-superconducting) conductors, such as copper or silver, this decrease is limited by impurities and other defects.