Lead
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Lead is a chemical element. Exposure to lead should be avoided it is very toxic to humans and other animals. Lead forms naturally in the earth's crust as a dark greyish-blue shiny metal. Its use is restricted in many countries. It was used in gasoline to prevent the engine from knocking, but not anymore, because people got poisoned by the exhaust. It is also used to shield radioactive materials (it stops the radioactivity getting passed it). See picture for more details.
More Things to know About Lead:
Lead's element symbol is Pb, Atomic Number is 82, Atomic Weight is 207.2, Period 6, Group 14, Pelting point 327.8 C,
Uses: Paint, bullets, ammunition, batteries, water, lead weights, and as a radiation sheild, etc.
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