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Lead (Pb) properties


Atomic mass, symbol and atomic number

lead is a naturally occurring element with the element symbol Pb and the atomic number 82. In the periodic table it stands with an atomic mass of 207.2 u in the 4th main group. The chemical element is not radioactive and is in a solid state at room temperature.

Profile: Lead

General
Chemical element:lead
Symbol:pb
Atomic number:82
Group:Carbon group
Period:6
Block:p-block
Series:metals
Appearance:grey black
explorers:
Year of discovery:primeval
Atomic properties
Atomic mass:207.20 u
Atomic radius:180 pm
Covalent radius:146 pm
Van der Waals radius:202 pm
Electron configuration:Xe 4f14 5d10 6s2 6p2
ionization:715.6 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:cubic
Magnetism:diamagnetic
molar volume:18,26 · 10-6 m3/ mol
Mohs hardness:1,5
Melting point:327 ° C
Boiling point:1744 ° C
Heat of fusion:4.77 kJ / mol
Heat of vaporization:177 kJ / mol
Thermal conductivity:35 W
Chemical properties
electronegativity:2,33

Did you know that ...

  • Lead is one of the softest metals? (Mohs hardness = 1.5)
  • Lead, with the exception of the Antarctic, can be mined on all continents?
  • the abbreviation Pb for lead comes from the Latin "plumbum" = lead?
  • Lead with the most effective protection against radiation and therefore lead aprons are used in X-ray examinations?