Lead

Important Information About Lead

atomic number= 82

atomic mass= 207. 21

chemical symbol= Pb

classification= metal


Overview

Lead is the heaviest metal of the carbon family. Even though it is a part of the carbon family (in group 14), it is very different in appearance and behaviour of carbon. Lead is in the 6th period. 

Lead is the most commonly known substance to the ancient peoples. One of the oldest findings were part of a small statue in Egypt. It was made during the First Dynasty, in 3400 B.C, but also mentioned in old writings of India and the Bible. 

Sunday, December 6, 2009

Physical Properties

Physical Properties

Lead is a soft and malleable but also ductile metal. It is also very heavy. It has a shiny surface when first cut, although it slowly tarnishes becoming very dull. Lead can be bent, cutted, shaped, and pulled. The hardness of lead is 1.5. It has a grey with slightly blue colour. It is opaque meaning you cannot see through it at all. Its density is 11.34 grams per cubic metre. The melting point of lead is 327.6°C (600.75K) and its boiling point is 1,740°C (2013K). Lead does not condust electric currents, sound, or vibration well. It is a solid.

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