Cesium

Symbol 符号

Cs

Atomic number 原子序数

55

Atomic mass 原子质量	132.905		Thermal conductivity 热导率	0.359
Atomic radius 原子半径	3.34		Covalent radius 共价半径	2.35
Density 密度	1.87		Atomic volume 原子体积	71.07
Melting point 熔点	301.55		Oxidation states 氧化态	1
Boiling point 沸点	952		Stable isotopes 稳定同位素	1
Heat of vapor. 汽化热	67.74		Electronegativity 电负性	0.79
Heat of fusion 熔化热	2.092		First ionization 第一电离能	3.894
Specific heat 比热容	0.24		Electrical conduct. 电导率	...

Electron configuration 电子排布

Cesium

The compounds of cesium are similar to those of potassium. This presents a particular hazard when radioactive cesium-137 contaminates the soil, as it did near Chernobyl. Growing plants require large amounts of potassium, and concentrate it from the soil. Since cesium mimics potassium, the radioactive cesium is also taken up and reconcentrated. The result is that plants grown on contaminated soil may contain a much higher concentration of radioactive cesium than the soil in which they are grown.

The electron configuration of cesium consists of one lone 6s electron outside a perfectly symmetrical core of 54 other electrons characteristic of the noble element xenon. This fact has made it the foundation for mankind's best clock, the cesium atomic clock.

Cesium Nuclear Data