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Study with Quizlet and memorize flashcards containing terms like Atomic number, Atomic mass, Cesium was discovered by Robert W Bunsen and Gustav Kirchhoff in 1860 at Germany. and more.
Study with Quizlet and memorize flashcards containing terms like cesium, manganese, radon and more.
Terms in this set (19) radioactive? Study with Quizlet and memorize flashcards containing terms like symbol, group, period and more.
Definition. Cesium is a soft, silvery-white alkali metal that is the most electropositive and reactive of all the stable elements. It is the least dense of the stable elements and has the highest electron affinity of any element, making it highly reactive and prone to forming ionic compounds.
Definition. Cesium is a soft, silvery-gold alkali metal with the atomic number 55 and is known for its high reactivity and unique properties, such as being one of the most electropositive elements.
Caesium (IUPAC spelling; [9] also spelled cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F; 301.6 K), which makes it one of only five elemental metals that are liquid at or near room temperature.
Cesium is an alkali metal that reacts explosively with water and melts just above room temperature. The word "cesium" is derived from caesium (Latin for "sky blue"). The name was chosen because of the blue lines observed by Robert Bunsen and Gustav Kirchhoff during their analysis of springwater with a spectroscope in 1860.
