Lead is mainly used for manufacturing lead-acid batteries; lead alloys can be used for casting and soldering; lead is also used for manufacturing radioactive radiation and X-ray protective equipment; lead and its compounds are highly toxic to the human body and can accumulate in the human body. Lead is used as a building material, used in lead-acid batteries, as gun and shells, and solder, trophies, and some alloys also contain lead. Lead can also be made into a flowering bomb (also known as the Damm bomb).
Lead is not contained in the earth's crust. There is a very small amount of natural lead in nature. However, due to the accumulation of lead-containing minerals, the melting point is very low (328 °C), making lead used by people in ancient times. Galena (PbS) has been the main source of lead for people today. In ancient times, people accidentally cast galena into a bonfire. It was first burned into an oxide and then reduced by carbon to form metallic lead.
The surface of lead can generate basic lead carbonate film in the air to prevent internal oxidation. Lead brick or lead clothing is manufactured to protect X-rays and other radiation. Used to make alloys. An equal amount of lead and tin electrodes can be used for welding metals. Live type gold. The melting point of lead and antimony is used to make fuses. Can be used to make lead pellets.