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Cesium:

Atomic number 55;

Symbol: Cs;

Discovered: 1860, by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff;

Isolated: 1882 by Carl Setterburg;

Melting point: 28.4 °C;

Boiling point: 670 °C;

Isotopes: 32 (the most of any element)

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12y ago

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