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Pb - Lead

Lead

 Lead 
Pb
Atomic Number: 82
Atomic Weight: 207.2
Element Type: Metal
Crystal Structure: Cubic Face Centered
Melting Point: 327.46°C = 621.428°F = 600.61 K
Boiling Point: 1749.0°C = 3180.2°F = 2022.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.81 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.47 Å
Electronegativity: 1.8

History

(Anglo-Saxon lead; L. plumbum) Long known, mentioned in Exodus. The alchemists believedlead to be the oldest metal and associated with the planet Saturn. Native lead occurs innature, but it is rare.


Sources

Lead is obtained chiefly from galena (PbS) by a roasting process. Anglesite, cerussite,and minim are other common lead minerals.







Science Quote

'You cannot hope to build a better world without improving the individuals. To that end each of us must work for his own improvement, and at the same time share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.'

Marie Curie
(1867-1934)





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