Lead
From the Simple English Wikipedia, the free encyclopedia that anyone can change
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 it is not anymore, because some people got poisoned by the exhaust. It is also used to shield radioactive materials (it stops the radioactivity getting past it). See the 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,
- Melting point 327.8 °C,
Uses: Paint, bullets, ammunition, batteries, water, lead weights, and as a radiation shield etc.
Invented by Pamela Inema.
[change] See also
- Thomas Midgley (American inventor)
