Color: Pure copper has a reddish-orange color. When exposed to air, it develops a thin layer of copper oxide, which gives it a dull brownish-red appearance.

Luster: Copper has a metallic luster, meaning it reflects light well and has a shiny appearance.

Density: Copper is a relatively dense metal, with a density of 8.96 grams per cubic centimeter (g/cm³).

Malleability and Ductility: Copper is very malleable, meaning it can be hammered into thin sheets, and ductile, meaning it can be drawn into thin wires.

Electrical and Thermal Conductivity: Copper is an excellent conductor of electricity and heat. It is often used in electrical wiring and for making heat sinks.

Reactivity: Copper is a relatively reactive metal. It reacts with oxygen in the air to form copper oxide, and it can also react with other elements such as chlorine, sulfur, and nitric acid.

Crystal Structure: Copper has a face-centered cubic crystal structure. This means that the atoms are arranged in a regular pattern, with each copper atom surrounded by six other copper atoms. This structure gives copper its unique properties, such as its high electrical and thermal conductivity.