![[ATOM]](atom.gif) |
Lead
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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]](b0082.gif) |
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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
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Isotopes
| 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 |
Facts
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