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Cesium clock F1()
An example of the element Cesium

Sample Image
Cesium Cesium clock F1
Cesium clock F1. (External Sample)
This a photograph of F1, the master cesium atomic clock at NIST in Boulder, Colorado.
Location: Boulder, CO
Photographed: 17 April, 2009
Text Updated: 1 November, 2009
Size: 100"
Purity: <1%
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