Lead (/ lɛd /) is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, …

2025年1月27日 · Lead (CAS 7439-92-1) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook.

Lead nitrate (Pb (NO 3) 2) is used to make fireworks and other pyrotechnics. Lead silicate (PbSiO 3) is used to make some types of glass and in the production of rubber and paints.

2025年2月14日 · lead (Pb), a soft, silvery white or grayish metal in Group 14 (IVa) of the periodic table. Lead is very malleable, ductile, and dense and is a poor conductor of electricity.

Lead is the 82nd element in the periodic table and has a symbol of Pb and atomic number of 82. It has an atomic weight of 207.2 and a mass number of 208. Lead has eighty-two protons and one hundred twenty-six neutrons in its nucleus, and eighty-two electrons in six shells.

2020年7月30日 · There is still an issue with the lead-free solders, which is why in anything that must be reliable lead solder is still used. That includes pacemakers and space satellites. And of course that old warning still applies, even with lead-free electronics: "never pull parts off the circuit board and eat them." They are still bad for one's health.

2012年12月9日 · We now call ‘white lead’ tin. Tin sits directly above lead in the periodic table. Lead’s chemical symbol is Pb, which comes from its Latin name. Our name for the element comes from the Anglo-Saxon word for the metal, ‘lead’. The …

2025年2月5日 · Lead consists of Four naturally occurring isotopes: 204 Pb, 206 Pb, 207 Pb and 208 Pb. Lead has an atomic number of 82 and is a grey metal. It has a melting point of 327.46 °C (621.43 °F) and a boiling point of 1749 °C (3180 °F). Pb has a solid phase density of 11.34 g/cm 3 and a liquid or molten phase density of 10.66 g/cm 3.

2020年1月4日 · Lead (Pb) is a soft gray metal that has the atomic number 82 in the periodic table in Group 14. It has the symbol Pb.

2020年4月9日 · Lead is a chemical element with atomic number 82 in the periodic table. It’s available in Earth’s crust at 14 ppm and is typically found in the form of several different lead ores. This lustrous heavy metal has four valence electrons and the heaviest stable atom among all other elements of Mendeleev’s system.