Zinc and Lead are both metallic elements found in the Earth's crust. Zinc, with the symbol Zn, is a bluish-white metal known for its corrosion resistance and is commonly used in galvanizing steel to prevent rust. It also plays a vital role in various biological functions, including immune system support. Lead, represented by the symbol Pb, is a heavy, malleable metal that has been used for centuries in products like pipes and paints. However, due to its toxicity, the use of lead has been significantly restricted in many applications to protect human health and the environment.