Cesium
Cesium is the fifth member of the alkali family, the elements that make up Group 1 of the periodic table. Its atomic number is 55, its atomic mass is 132.9054, and its chemical symbol is Cs.
Pr...
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Cesium
Cesium is an alkali metal element denoted by the atomic symbol Cs. It has an atomic number of 55 and an atomic weight of 132.91. It is a very soft, white metal which is not particularly abundan...
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Cesium
Symbol
Cs
Atomic Number
55
Atomic Mass
132.9054
Family
Group 1 (Ia) Alkali Metal Pronunciation
SEE-zee-um
Overview
Cesium is a member of the alkali family, which consists of elements in Group ...
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In 1860, Cesium was discovered by Gustav Kirchoff and Robert Bunsen in Germany, while using a spectrophotometer to view lines identifying elements in Durkheim mineral water.
Cesium is found in pol...
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Time is one of the seven fundamental quantities in nature. I made a case in the last installment of this column (1) that mechanical devices for measuring time — clocks — might be consid...
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Cesium
Cesium
Cesium
The Element: Cesium
Atomic Clocks: An Application of Spectroscopy
