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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

'Strange is our situation here upon the earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose.'

Albert Einstein
(1879-1955)


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