Make your own free website on


Information valid for Pb-207 unless otherwise noted

Basic Information

Symbol: Pb
Atomic Number: 82
Mass: 207.2
Melting Point: 327.5 C
Boiling Point: 1740.0 C
Number of Protons/Electrons: 82
Number of Neutrons: 126
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

  1. 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-202 53000.0 years
Pb-203 2.16 days
Pb-204 Stable
Pb-204m 1.12 hours
Pb-205 1.5E7 years
Pb-206 Stable
Pb-207 Stable
Pb-208 Stable
Pb-209 3.25 hours
Pb-210 22.3 years
Pb-211 36.1 minutes
Pb-212 10.64 hours
Pb-214 27.0 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