cesium: Quick Facts

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Facts

Also Known As	caesium • Cs

Photos

A labeled diagram highlights the chemical properties of cesium from the periodic table, showing its symbol Cs, atomic number 55, atomic weight, electron configuration, strong basicity, body-centered cubic crystal structure, and solid state at room temperature.

cesium atomic clock

Line graph showing the first ionization energies of the elements as a function of atomic number, with peaks at noble gases like helium, neon, argon, krypton, xenon, and radon, and labeled elements at key points.

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Topics

cesium-137 cesium-133 chemical element alkali metal hydrogen carbon sodium nitrogen sulfur phosphorus boron iodine fluorine zinc

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Key People

Robert Bunsen

Robert Bunsen

German chemist

Kirchhoff, Gustav

Gustav Kirchhoff

German physicist

Periodic Table of the elements concept image (chemistry)

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Concept artwork on the periodic table of elements.

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