사용자:Js091213/납: 두 판 사이의 차이

 

'''Lead''' is a [[chemical element]] with symbol '''Pb''' (from the [[Latin]] ''plumbum'') and [[atomic number]] 82. It is a [[heavy metals|heavy metal]] that is [[density|denser]] than most common materials. Lead is [[Mohs scale of mineral hardness#Intermediate hardness|soft]] and [[malleable]], and has a relatively low [[melting point]]. When freshly cut, lead is bluish-white; it [[tarnish]]es to a dull gray color when exposed to air. Lead has the highest atomic number of any [[stable nuclide|stable element]] and concludes three major [[decay chain]]s of heavier elements.