Periodic Table of the Elements Lead

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Periodic Table of the Elements: Lead

Periodic Table of the Elements: Lead

Atomic Number:	82
Atomic Symbol:	Pb
	Lead
Atomic Weight:	207.2
Electron Configuration:	2 · 8 · 18 32 · 18 · 4

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lead

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

lead (symbol Pb) Metallic element of group IV of the periodic table, known from ancient times. Its chief ore is galena (lead sulphide), from which lead is obtained by roasting. Exposure to lead from paints, pipes, petrol and other sources can lead to lead poisoning. Soft and malleable, it is used as a shield for X-rays and nuclear radiation, and in plumbing, batteries, cable sheaths, and alloys such as pewter and solder. Chemically, lead is unreactive and a poor conductor of electricity. Properties: at.no. 82; r.a.m. 207.19; r.d. 11.35; m.p. 327.5°C (621.5°F); b.p. 1740°C (3164°F); most common isotope Pb²⁰⁸ (52.3%).

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