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Caesium on the periodic table12/5/2023 These clocks are a vital part of the internet and mobile phone networks, as well as Global Positioning System (GPS) satellites. Naming: From Latin caesius (sky blue), Its compounds burn with blue or violet colour.ĭiscovery: Robert Bunsen and Gustav Kirchhoff (1860) Heidelberg, Germanyįirst isolation: Carl Setterberg (1882) Cesium UsesĬesium is used in industry as a catalyst promoter, in vacuum tubes and light bulbs to remove traces of oxygen, and in radiation monitoring equipment.Ĭaesium nitrate is used to make special optical glasses.Ĭaesium chloride is used in optical instruments, photoelectric cells, and in increasing the sensitivity of electron tubes.Ī Caesium vapour is used in many common magnetometersĪ Cesium is mainly used in (Cesium clock) atomic clock. The metal reacts vigorously with all Halogens and form Cesium halides:Ģ Cs (s) + 3 F 2 (g) → 2 CsF 3 (s) (Cesium fluoride)Ģ Cs (s) + 3 Cl 2 (g) → 2 CsCl 3 (s) (Cesium chloride)Ģ Cs (s) + 3 Br 2 (g) → 2 CsBr 3 (s) (Cesium bromide)Ģ Cs (s) + 3 I 2 (g) → 2 CsI 3 (s) (Cesium iodide)ĭissolves readily in dilute sulfuric acid to form Solutions containing Cs (l) ions (aquated):Ģ Cs (s) + H 2SO 4 (aq) → 2 Cs + (aq) + SO 4 2– (aq) + H 2 (g)↑ Cesium History ![]() Reacts with hydrogen (forming a cesium hydride): However, cesium-water explosion is less powerful than sodium-water explosion:Ģ Cs (s) + 2 H 2O (l) → 2 CsOH (aq) + H 2 (g) Reacts explosively with water even at low temperatures (form Cesium hydroxide and hydrogen gas). The metal is highly reactive and Pyrophoric (ignite spontaneously in air or below 55 oC), Formation of cesium superoxide. Isotopes: 133 Cs 134 Cs 135 Cs 137 Cs Isotope Ionization energies: 1st: 375.7 kJ.mol 2nd: 2234.3 kJ/mol 3rd: 3400 kJ/molīody Centered Cubic (BCC) Reactivity of CesiumĮlectron affinity: 45.5 kJ/mol Nuclear Properties of Cesium Molar magnetic susceptibility: -0.372×10 -9 m 3/mol Physical Properties of Cesiumĭensity: 1.93 g/cm 3 (In solid) 1.843 g/cm 3 (In Liquid)īrinell hardness: 0.14 MPa Atomic Properties of Cesium Mass magnetic susceptibility: -2.8×10 -9 m 3/kg Volume magnetic susceptibility: -0.00000526 ![]() Thermal conductivity: 35.9 W/(m∙K) Electrical properties of CesiumĪ Electrical type: Conductor Magnetic Properties of Cesium ![]() Cesium Electron Configuration Thermal Properties of Cesium
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