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 ...

铅是一种金属化学元素，元素符号Pb，原子序数为82，原子量为207.2，是原子量最大的非放射性元素。 金属铅为面心立方晶体。 金属铅是一种耐蚀的重有色金属材料，铅具有熔点低、耐蚀性高、X射线和γ射线等不易穿透、塑性好等优点，常被加工成板材和管材 ...

铅（ 拼音： qiān ，注音： ㄑㄧㄢ ，粤拼： jyun4 ；英語： Lead ），是一種化學元素，其化學符號为Pb [3] （源于拉丁語： Plumbum ），原子序數为82，原子量為 207.2 u 。铅是比大多數常見材料密度更高的重金屬。它是柔軟、可鍛鑄、熔點较低的金属。

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. Known in antiquity and believed by the alchemists to be the oldest of metals, lead is highly durable and resistant to corrosion , as is indicated by the continuing use of ...

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.

Lead is a chemical element with symbol Pb and atomic number 82. Classified as a post-transition metal, Lead is a solid at room temperature. [Xe]6s 2 4f 14 5d 10 6p 2. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

Exposure to lead (Pb) from environmental sources remains an overlooked and serious public health risk. Starting in childhood, Pb in the skeleton can disrupt epiphyseal plate function, constrain the growth of long bones, and prevent attainment of a high peak bone mass, all of which will increase susceptibility to osteoporosis later in life.

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.

2025年1月27日 · Found in ore with copper, zinc, and silver, lead is found in mineral form as galena (PbS), anglesite (PbSO4), and cerussite (PbCO3). It is easily malleable, smelted, and can be added to other metals to form alloys.

铅，是化学元素，其化学符号是Pb (拉丁语Plumbum)，原子序数为82。 铅是柔软、延展性强的弱金属，有毒，也是重金属。 铅的本色为青白色，在空气中表面很快被一层暗灰色的氧化物覆盖。 可用于建筑材料、铅酸蓄电池、枪弹和炮弹、焊锡、奖杯和某些合金。 第一电离能7.416电子伏特。 第二电离能15.874电子伏特。 熔点327.5℃，沸点1740℃。 密度13.34克/厘米3。 银灰色重金属，质柔软，延性弱，展性强。 空气中表面易氧化而失去光泽，变灰暗。 溶于硝酸，热硫酸、 …