{"id":63089,"date":"2023-12-08T16:59:16","date_gmt":"2023-12-08T15:59:16","guid":{"rendered":"https:\/\/blog.salesflare.com\/entity\/lead"},"modified":"2023-12-08T16:59:16","modified_gmt":"2023-12-08T15:59:16","slug":"lead","status":"publish","type":"entity","link":"https:\/\/blog.salesflare.com\/it\/entity\/contatto-commerciale","title":{"rendered":"piombo"},"content":{"rendered":"<p class=\"translation-block\">Il piombo () \u00e8 un elemento chimico del gruppo del carbonio, con simbolo Pb (da ) e numero atomico 82. Il piombo \u00e8 un metallo di transizione morbido, malleabile e pesante. Il piombo metallico ha un colore bianco-bluastro dopo essere stato appena tagliato, ma si appanna presto in un colore grigiastro opaco se esposto all'aria. Il piombo ha una lucentezza cromo-argento quando viene fuso in un liquido. \u00c8 anche l'elemento non radioattivo pi\u00f9 pesante. Il piombo viene utilizzato per la costruzione di edifici, batterie al piombo, proiettili e pallini, pesi, come parte di saldature, peltri, leghe fusibili e come scudo contro le radiazioni. Il piombo ha il numero atomico pi\u00f9 alto di tutti gli elementi stabili, anche se l'elemento immediatamente superiore, il bismuto, ha un isotopo con un tempo di dimezzamento cos\u00ec lungo (oltre un miliardo di volte l'et\u00e0 stimata dell'universo) da poter essere considerato stabile. I quattro isotopi stabili del piombo hanno 82 protoni, un numero magico nel modello di guscio nucleare dei nuclei atomici. L'isotopo piombo-208 ha anche 126 neutroni, un altro numero magico, ed \u00e8 quindi doppiamente magico, una propriet\u00e0 che gli conferisce una maggiore stabilit\u00e0: il piombo-208 \u00e8 l'isotopo stabile pi\u00f9 pesante conosciuto. Se ingerito, il piombo \u00e8 velenoso per gli animali e per gli esseri umani, in quanto danneggia il sistema nervoso e causa disturbi cerebrali. Un eccesso di piombo provoca anche disturbi del sangue nei mammiferi. Il piombo \u00e8 una neurotossina che si accumula sia nei tessuti molli che nelle ossa. L'avvelenamento da piombo \u00e8 stato documentato nell'antica Roma, nell'antica Grecia e nell'antica Cina.<\/p>","protected":false},"excerpt":{"rendered":"<p>Lead () is a chemical element in the carbon group with symbol Pb (from ) and atomic number 82. 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