The chemical symbol for lead is "Pb." This symbol derives from the Latin word for lead, which is "plumbum." Lead is a heavy metal that has been used historically in plumbing, batteries, and radiation shielding. Its properties include being malleable and dense, which have made it valuable in various applications. However, due to health concerns associated with lead exposure, its use has been heavily regulated in many countries. Today, alternative materials often replace lead in many products to ensure safety and reduce environmental impact.