What are some characteristics of copper?
Inexpensive, brown, pennies are made out of it. Also copper is an element on the periodic table.
What distinguishes a compound like copper sulfide from an ordinary mixture of copper powder and sulfur?
Beryllium Copper (BeCu) also called Spring Copper amongst other names, is a non-ferrous alloy of copper, meaning that it won't rust, that is of high strength (200,000psi). It is excellent for metalwork because of this natural strength and is also ductile, weldable and machinable. Furthermore, it can be heat-treated to improve its durability and strength. It is hazardous to breathe in whilst processing it since the Beryllium-based dust and vapor is toxic.
Chemical formulas or symbols do not vary with the phase of a material. Therefore, the chemical symbol* for copper is always Cu, whether the metal is solid, liquid, or gas. _________________________ *Chemical elements such as copper have symbols, rather than formulas, which are characteristics of chemical compounds.