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... > Science Keywords > EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONTAMINANTS > LEAD

Preferred term

LEAD  

Definition

  • A chemical element and a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is bluish-white; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. (en)

Broader concept

Change note

  • 2018-03-07 07:54:43.0 [tstevens] Insert Concept add broader relation (LEAD [6fe420c1-2285-4031-babe-f0243c59a617,310669] - CONTAMINANTS [42c6d91b-afef-4638-95c5-0d130828b2e7,84623]);
  • 2018-03-07 09:29:12.0 [tstevens] insert Definition (id: null text: A chemical element and a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is bluish-white; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/6fe420c1-2285-4031-babe-f0243c59a617

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