Αποτελέσματα Αναζήτησης
22 Νοε 2024 · Lead, 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. Known in antiquity and believed by the alchemists to be the oldest of metals, lead is highly durable and resistant to corrosion.
Lead (pronounced "led") 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, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue.
14 Σεπ 2023 · 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. Freshly cut lead appears silver with a tinge of blue.
Lead has been known to, and used by, humans for many centuries. This long history is reflected in the image by the use of an early alchemical symbol for lead and carved Ancient Roman characters. A dull, silvery-grey metal. It is soft and easily worked into sheets.
Lead (pronunciation: LED) is a soft, malleable, and ductile element having a high corrosion resistance, denoted by the chemical symbol Pb. A poor conductor of electricity, it slowly forms a dull coating when exposed to air [1].
lead, Metallic chemical element, chemical symbol Pb, atomic number 82. Lead is a soft, silvery white or grayish, malleable, ductile, dense metal that conducts electricity poorly. Its stable isotope s are all end products of radioactive decay of uranium and other heavy elements.
8 Αυγ 2023 · Lead is the chemical element represented by the symbol Pb and possesses the atomic number 82. It is a heavy metal with various properties that have made it useful for a range of applications.
