사용자:Js091213/납: 두 판 사이의 차이

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'''납'''({{llang|en|lead|레드}}) 또는 '''연'''(鉛)은 [[화학 원소]]로, 기호는 '''Pb'''(←{{llang|la|plumbum|플룸붐}})이고 [[원자 번호]]는 82이다. 이 금속은 다른 금속보다 더 [[밀도]]가 높고 무거운 [[중금속]] 원소다. 납은 무르고 [[가단성]]이 있으며 [[녹는점]]이 비교적 낮은 금속이다. 금방 자른 납은 푸른 빛을 띄는 흰색 금속이지만, 공기에 노출 시 어두운 회색 금속으로 [[변색]]된다. 납은 [[안정 원소]] 중 가장 높은 번호를 가지고 있으며, 납보다 더 큰 원소가 [[방사성 붕괴|3가지 형태로 붕괴]]하고 마지막으로 납의 [[동위 원소]]로 변하여 안정해진다.
 
Lead납은 is비교적 a반응성이 relatively unreactive낮은 [[post-transition전이후 metal금속]]이다. Its납의 weak약한 metallic금속적 character특징은 is illustrated by its납의 [[amphoteric양쪽성]]으로 nature;인해 lead나타난다. and이는 [[lead oxide]]s산화물이 react분자 with [[acid]]s공유 and [[base (chemistry)|bases결합]], and하는 it경향이 tends있기 to때문이다. form납의 [[covalent bond화합물]]s.은 일반적인 [[Chemical14족 compound원소|Compounds탄소족]] of달리 lead are usually found in the+4보다 +22의 [[oxidation state산화수]] rather가진 than상태로 the +4 state common with lighter members of the [[carbon group]]발견된다. Exceptions are mostly limited to [[organolead compound]]s. Like the lighter members of the group, lead tends to [[chemical bond|bond]] with itself; it can form chains, rings and polyhedral structures.
 
Lead is easily extracted from its [[ore]]s; prehistoric people in Western Asia [[metals of antiquity|knew of it]]. [[Galena]], a principal ore of lead, often bears [[silver]], interest in which helped initiate widespread extraction and use of lead in [[ancient Rome]]. Lead production declined after the [[Fall of the Western Roman Empire|fall of Rome]] and did not reach comparable levels until the [[Industrial Revolution]]. In 2014, annual global production of lead was about ten million tonnes, over half of which was from recycling. Lead's high density, low melting point, [[ductility]] and relative inertness to [[oxidation]] make it useful. These properties, combined with its relative abundance and low cost, resulted in itqjsduranfcnrks extensive use in construction, [[plumbing]], [[lead–acid batteries|batteries]], [[bullet]]s and [[lead shot|shot]], weights, [[solder]]s, [[pewter]]s, [[fusible alloy]]s, [[lead paint|white paints]], [[leaded gasoline]], and [[radiation shield]]ing.