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
Crystal Structure: Cubic
Density @ 293 K: 11.34 g/cm3
Color: bluish
Atomic Structure
![[Bohr Model of Lead]](b0082.gif) |
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 |
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 ancientsDiscoverer: 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
Information provided by: http://www.chemicalelements.com