Relative atomic mass: 207.2 +- 0.1

English: Lead
French: Plomb
Croatian: Olovo
German: Blei
Italian: Piombo
Spanish: Plomo

Atomic number: 82
Group numbers: 14
Period: 6
Standard state (20 oC): solid

Discovery: - -
Lead has been known since ancient times. The origin of the name comes from the Latin word plumbum meaning liquid silver. It is a very soft, highly malleable and ductile, blue-white shiny metal that tarnishes in moist air but is stable in oxygen and water. Lead dissolves in nitric acid and its compounds are toxic by inhalation or ingestion. The toxins have a cumulative effect. Lead is found most often in ores called galena or lead sulfide (PbS). It is used in solder, shielding against radiation and in batteries. The price of 99.5 % pure lead granules is 28.70 for 500 g.
Electronic configuration: [Xe] 4f14 5d10 6s2 6p2
Formal oxidation number: +2 +4
Atomic radius: 175 pm

Electronegativities: 1.8
Thermal conductivity: 35.3 W/(m K)
Electrical resistivity (20 oC): 20.648 microOhm cm

Melting point: 327.46 oC
Boiling point: 1749 oC

Heat of fusion: 5.121 kJ/mol
Heat of vaporization: 177.8 kJ/mol
Heat of atomization: 195.74 kJ/mol

81Tl <= 82Pb => 83Bi

ASCII Periodic Table of the Elements
29 Aug. 2017
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