Answer: Copper is the metal that has a gleaming brown colour. When copper is heated in the air, it combines with oxygen in the air to generate copper oxide, which is black in colour
2CuO → 2Cus + O2g
Copper (Cu) is an atomic number 29 chemical element. It’s a native metal, meaning it can be found in its purest form in nature. Below is a list of copper’s qualities.