Atomic number: 82

Symbol: Pb

Category: post-transition metal (poor conductor of electricity)

Density at 25°C: solid: density: 11.34 g·cm−3

This element has been well known since Roman times. the symbol Pb comes from the latin plumbum, the metal used for ancient plumbing. Though now it is known cause damage to the nervous system. It is mostly used in lead acid batteries and in construction. 

Lead sample that is slightly oxidised. image: adapted from wikipedia

Use, natural applications or common combinations: 

  • ballast, batteries
  • bullets, solders
  • radiation shielding

Basic characteristics:

  • Standard atomic weight: 207.2(1)
  • Melting point: 327.46 °C
  • Boiling point: 1749 °C
  • Radioactivity: all naturally stable. Some isotopes have very long half lives.