Lead

 


 

Name Lead
Symbol Pb
Atomic Number 82
Atomic Mass 207.2 atomic mass units
Number of Protons 82
Number of Neutrons 125
Number of Electrons 82
Melting Point 327.5 C
Boiling Point 1740.0 C
Density 11.34 grams per cubic centimeter
Normal Phase Solid
Family Other Metals
Period Number 6
Cost Unavailable

 


 

Origin of Name From the Greek word protos, meaning first
The symbol came from the Latin word plumbum, meaning lead
Date and Place of Discovery Known to the ancients
Discovered by Unknown
Common Compounds
Interesting facts
  • It does not occur in nature in large amounts.
  • It is usually found in zinc, silver and copper ores.
  • Galena contains about 86.6% of lead.
  • The greatest source of lead today is in recycling automobile batteries.
  • It is a soft, heavy, toxic metal that is malleable.
  • It is bluish white when cut but as it is exposed to the air it turns a dull gray.
  • It has the highest atomic number of all the stable elements.
  • It is a neurotoxin that accumulates in soft tissues and bone.
  • It is not a good conductor of electricity.
Common Uses
  • Batteries
  • Bullets
  • Solder, especially for electronics
  • Pewter
  • Ceramic glaze coloring
  • Fishing sinkers
  • Radiation shield
  • Coolant for reactors
  • Organ pipes
  • Electrolysis
  • High voltage power cables
  • Ballast keel of sailboats
  • Roofing materials
  • Scuba diving weight belts

 

Photo Courtesy of About.com
Chemical Elements
Jefferson Labs
Web Elements
Wikipedia




Lead Atomic Structure Elements by Name Elements by Number

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