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Lead (/ l ɛ d /) 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. It tarnishes to a dull gray color when exposed to ...
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the ... 82 Pb lead; use: 600.61 K: 327.46 °C: 621.43 °F WEL: 600.61 K:
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. ... Lead: 11.342: 600.61: 2,022 ...
Letting this mixture cool the alloy will remain liquid even through 355 °C, the melting point of pure lead. Once the temperature reaches 291 °C, lead crystals will start to form, increasing the cohesion of the liquid alloy. At 252 °C, the mixture will start to fully solidify, during which the temperature will remain constant.
In the past, it was an alloy of tin and lead, but most modern pewter, in order to prevent lead poisoning, is not made with lead. Pewter has a low melting point, around 170–230 °C (338–446 °F), depending on the exact mixture of metals.
Melting point: 1,113 [1] °C (2,035 °F; 1,386 K) Boiling point: ... Lead(II) sulfide (also spelled sulphide) is an inorganic compound with the formula Pb S.
The mining and smelting process involved melting down galena, an ore of lead that produced thousands of ounces of lead during the process. ... “An IQ reduction of 2 to 3 points doesn’t sound ...
Reaction of lead with sulfur or hydrogen sulfide yields lead sulfide. The solid has the NaCl-like structure (simple cubic), which it keeps up to the melting point, 1114 °C (2037 °F). If the heating occurs in presence of air, the compounds decomposes to give the monoxide and the sulfate. [7]