General Information
| Symbol: | Cs |
| Atomic Number: | 55 |
| Atomic Weight: (Atomic Mass, Molar Mass) | 132.9054519 |
| Group: | 1 (alkali metals or hydrogen family/lithium family) |
| IA (Old IUPAC), IA (CAS) |
| Period: | 6 |
| Block: | s |
Physical Properties
| Density: | 1.87 g/cm3 |
| Atomic Volume: | 70.0 cm2/mole |
| Atomic Radius: | 2.67 angstroms |
| Covalent Radius: | 225 pm |
| Radioactive: | No |
States
| Melting Point: | 28.4 °C |
| Boiling Point: | 669.0 °C |
| Heat Of Fusion: | 2.092 kJ/mole |
| Heat Of Vaporization: | 67.74 kJ/mole |
Energy
| Electronegativity: | 0.8 (Pauling Scale) |
| Electron Affinity: | -45 kJ/mol |
| 1st Ionization Energy: | 382 kJ/mol |
| Specific Heat Capacity: | 0.24 J g−1 K−1 |
| Thermal Conductivity: | 35.9 W·m−1·K−1 |
Electrons & Oxidation
| Oxidation States: | 1 |
| Electrons Per Shell: | 2 8 18 18 8 1 |
| Electron Configuration: | [Xe] 6s1 |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1 |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1 |
History
| Discovered In: | 1860 |
| Discovered By: | Gustav Kirchhoff, Robert Bunsen |
| Discovered At: | Germany |
| Word Origin: | From the Latin word "caesius" meaning "sky blue" or "heavenly blue" |
Translations
| English | Cesium |
| Deutsch | Zäsium |
| Lëtzebuergesch | Zäsium |
| Nederlands | Cesium |
| Afrikaans | Sesium |
| Frysk | Cesium |
| Dansk | Cæsium or Cesium |
| Svenska | Cesium |
| Norsk | Cesium |
| Íslenska | Sesín |
| Føroysk | Cæsium |
| Latin | Caesium |
| Français | Césium |
| Español | Cesio |
| Catalana | Cesi |
| Occitana | Cesi |
| Português | Césio |
| Galego | Cesio |
| Italiano | Cesio |
| Furlan | Cesi |
| Român | Cesiu (mo: Ceziu) |
| Moldavian | Cesiu (mo: Ceziu) |
| Armãneashte | Tseziumu |
| Русский | Цезий |
| Українска | Цезій |
| by | Цэзій |
| Polska | Cez |
| Kaszëbsczi | Céz |
| Čech | Cesium |
| Slovenský | Cézium |
| Slovenščina | Cezij |
| Hrvatska | Cezij |
| Српски | Цезиjум |
| Bosnian | Cezij |
| Македонски | Цезиум |
| Български | Цезий |
| Lietuviškai | Cezis |
| Lao | Cēzijs |
| Sudovian | Cezijan |
| Cymraeg | Cesiwm |
| Gaeilge na hÉireann | Caeisiam |
| Gàidhlig na h | Caesiam |
| Gaelg Vanninagh | Kaishum |
| Cornish | Cesyum |
| Brezhoneg | Seziom |
| Ελληνική | Καισιο |
| Shqip | Cezium |
| Ossetian | Цезий |
| Euskera | Zesioa |
| Georgian | ცეზიუმი |
| Suomi | Cesium |
| Eesti | Tseesium |
| Magyar | Cézium |
| Türkçe | Sezyum |
| Kazakh | Цезий |
| Uzbek | Цезий |
| Tajik | Cezi' |
| Mongolian | Цези |
| 日本語 | セシウム [seshiumu] |
| 中国话 | 銫 |
| ไทย | ซีเซียม |
| Vietnamese | Xezi, Xêzi |
| Bahasa Melayu | Sesium |
| العربيه | سيزيوم |
| Il-Malti | Siżjum |
| עברית | צזיום |
| Esperanto | Cezio |
Links
Misspellings: xesium, vesium, fesium, desium, cwsium, cssium, cdsium, crsium, c4sium, c3sium, ceaium, cezium, cexium, cedium, ceeium, cewium, cesuum, cesjum, ceskum, cesoum, ces9um, ces8um, cesiym, cesihm, cesijm, cesiim, cesi8m, cesi7m, cesiun, cesiuk, cesiuj, esium, csium, ceium, cesum, cesim, cesiu, ecsium, cseium, ceisum, cesuim, cesimu, ccesium, ceesium, cessium, cesiium, cesiuum, cesiumm
