Cesium is the first element discovered by spectral analysis technology.The discovery of cesium and the development of its concept can be roughly divided into three periods:First,the discovery of cesium and the formation of the concept of cesium based on spectral properties.The application of spectral analysis technology enabled chemists to determine the existence of cesium in advance and formed the concept of cesium based on spectral properties.The second is the formation of the concept of triple characterization of cesium element.The preparation of metallic cesium element and the determination of atomic weight make cesium element change from macroscopic to microscopic and then form the symbol characterization,and the concept of triple characterization of cesium element is formally formed.Third,the establishment of the concept of modern cesium element,the discovery of cesium isotope,gave the concept of cesium new connotation,cesium element has also made new development in the micro and symbolic,the concept of modern cesium element has been preliminarily established.The discovery of cesium and its concept development process are the embodiment of the integration of the continuous progress of analytical technology and the development of chemical thought.
关键词
光谱分析技术/铯元素/铯同位素/化学史
Key words
Spectral analysis technology/Cesium element/Cesium isotope/Chemistry history
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