Strontium

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Oxidized dendritic strontium

Strontium ( ) is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when exposed to air. It occurs naturally in the minerals celestine and strontianite. While natural strontium is stable, the synthetic ⁹⁰Sr isotope is present in radioactive fallout and has a half-life of 28.90 years. Both strontium and strontianite are named after Strontian, a village in Scotland near which the mineral was first discovered.

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WebElements.com – Strontium WebElements.com – Strontium www.webelements.com/strontium/ - Web

Chemistry in its element podcast Chemistry in its element podcast www.rsc.org/chemistryworld/podcast/element.asp - Web

University of Nottingham, Periodic Table of Videos University of Nottingham, Periodic Table of Videos www.periodicvideos.com/videos/038.htm - Web

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