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

Preferred term

CALCIUM  

Definition

  • An alkaline earth metal, calcium is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminum. (en)

Broader concept

Change note

  • 2018-03-07 07:52:37.0 [tstevens] Insert Concept add broader relation (CALCIUM [e5a658d5-74db-4022-894f-edc8d297767a,310653] - CONTAMINANTS [42c6d91b-afef-4638-95c5-0d130828b2e7,84623]);
  • 2018-03-07 09:18:36.0 [tstevens] insert Definition (id: null text: An alkaline earth metal, calcium is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth's crust and the third most abundant metal, after iron and aluminum. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/e5a658d5-74db-4022-894f-edc8d297767a

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