Final answer:
The symbol Cu designates the element copper, which is a transition metal with uses in electrical conductivity and as a building material.
Step-by-step explanation:
The symbol Cu designates the element copper. Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Copper is often used in alloys such as brass and bronze, and a freshly exposed surface of pure copper has a characteristic pinkish-orange color. As a conductor of heat and electricity, as well as a building material, copper's versatility is well acknowledged. Additionally, in chemistry, copper can form ions with different charges; the copper(I) ion is also known as the cuprous ion, and copper is classified as a transition metal because it has an incomplete d level in its common Cu²+ ion form.