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Lead at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Lead
Symbol: Pb
Atomic Number: 82
Atomic Mass: 207.2 amu
Melting Point: 327.5 °C (600.65 K, 621.5 °F)
Boiling Point: 1740.0 °C (2013.15 K, 3164.0 °F)
Number of Protons/Electrons: 82
Number of Neutrons: 125
Classification: Other Metals
Crystal Structure: Cubic
Density @ 293 K: 11.34 g/cm3
Color: bluish

Atomic Structure

[Bohr Model of Lead]  
Number of Energy Levels: 6

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 18
    Sixth Energy Level: 4


Isotope Half Life
Pb-20253000.0 years
Pb-2032.16 days
Pb-204m1.12 hours
Pb-2051.5E7 years
Pb-2093.25 hours
Pb-21022.3 years
Pb-21136.1 minutes
Pb-21210.64 hours
Pb-21427.0 minutes


Date of Discovery: Known to the ancients
Discoverer: Unknown
Name Origin: From the Greek word protos (first)
Symbol Origin: From the Latin word plumbum (lead)
Uses: solder and shielding against radiation, batteries
Obtained From: galena

Related Links

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