Plomo, or lead, is a heavy metal with the chemical symbol Pb and atomic number 82. It is dense, malleable, and has a low melting point, making it easy to shape and work with. Lead is commonly used in batteries, radiation shielding, and some types of plumbing. However, it is toxic to humans and can cause serious health issues, particularly in children. Lead occurs naturally in the Earth's crust and can be found in ores such as galena. Due to its toxicity, many countries have implemented regulations to limit lead exposure in products like paint and gasoline. Recycling lead from batteries is a common practice to reduce environmental impact.