What is the element "lead" used for?

Answer

Lead can be utilised as a pure metal, a chemical compound, or alloyed with other metals. Lead is a major constituent of the lead acid battery and is frequently used in a car battery. Other important uses of lead are oxides in glass, in ammunition production and in ceramics manufacture.
1 Additional Answer
Lead has other uses than just pencils. Yes, it sure does. Lead is also used in high-voltage power cables, as solder for electronics, and as a coolant. You can find more information here: http://en.wikipedia.org/wiki/Lead#Applications
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