General Information
| Symbol: | Se |
| Atomic Number: | 34 |
| Atomic Weight: (Atomic Mass, Molar Mass) | 78.96 |
| Group: | 16 (oxygen family) |
| VIB (Old IUPAC), VIA (CAS) |
| Period: | 4 |
| Block: | p |
Physical Properties
| Density: | 4.79 g/cm3 |
| Atomic Volume: | 16.5 cm2/mole |
| Atomic Radius: | 1.4 angstroms |
| Covalent Radius: | 116 pm |
| Radioactive: | No |
States
| Melting Point: | 217.0 °C |
| Boiling Point: | 685.0 °C |
| Heat Of Fusion: | 5.54 kJ/mole |
| Heat Of Vaporization: | 26.32 kJ/mole |
Energy
| Electronegativity: | 2.6 (Pauling Scale) |
| Electron Affinity: | -195 kJ/mol |
| 1st Ionization Energy: | 941 kJ/mol |
| Specific Heat Capacity: | 0.32 J g−1 K−1 |
| Thermal Conductivity: | 2.04 W·m−1·K−1 |
Electrons & Oxidation
| Oxidation States: | +4,-2,+6 |
| Electrons Per Shell: | 2 8 18 6 |
| Electron Configuration: | [Ar] 4s2 3d10 4p4 |
| 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 |
| 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 |
History
| Discovered In: | 1817 |
| Discovered By: | Jöns Berzelius |
| Discovered At: | Sweden |
| Word Origin: | From the Greek word "selene" meaning "moon" |
Translations
| English | Selenium |
| Deutsch | Selen |
| Lëtzebuergesch | Selen |
| Nederlands | Selenium |
| Afrikaans | Selenium |
| Frysk | Selenium |
| Dansk | Selen |
| Svenska | Selen |
| Norsk | Selen |
| Íslenska | Selen |
| Føroysk | Selen |
| Latin | Selenium |
| Français | Sélénium |
| Español | Selenio |
| Catalana | Seleni |
| Occitana | Selèni |
| Português | Selénio |
| Galego | Selenio |
| Italiano | Selenio |
| Furlan | Seleni |
| Român | Seleniu |
| Moldavian | Seleniu |
| Armãneashte | Selenuu |
| Русский | Селен |
| Українска | Селен |
| by | Селен |
| Polska | Selen |
| Kaszëbsczi | Selén |
| Čech | Selen |
| Slovenský | Selén |
| Slovenščina | Selen |
| Hrvatska | Selenij |
| Српски | Селен |
| Bosnian | Selen |
| Македонски | Селен |
| Български | Селен |
| Lietuviškai | Selenas |
| Lao | Selēns |
| Sudovian | Selenas |
| Cymraeg | Seleniwm |
| Gaeilge na hÉireann | Seiléiniam |
| Gàidhlig na h | Seilèiniam |
| Gaelg Vanninagh | Shellainium |
| Cornish | Selenyum |
| Brezhoneg | Seleniom |
| Ελληνική | Σεληνιο |
| Shqip | Selen |
| Ossetian | Селен |
| Euskera | Selenioa |
| Georgian | სელენი |
| Suomi | Seleeni |
| Eesti | Seleen |
| Magyar | Szelén |
| Türkçe | Selenyum |
| Kazakh | Селен |
| Uzbek | Селен |
| Tajik | Selen |
| Mongolian | Селен |
| 日本語 | セレン [seren] |
| 中国话 | 硒 |
| ไทย | ซีลีเนียม |
| Vietnamese | Selen |
| Bahasa Melayu | Selenium |
| العربيه | سيلينيوم |
| Il-Malti | Selinjum |
| עברית | סלניום |
| Esperanto | Seleno |
Links
Misspellings: aelenium, zelenium, xelenium, delenium, eelenium, welenium, swlenium, sslenium, sdlenium, srlenium, s4lenium, s3lenium, sekenium, sepenium, seoenium, selwnium, selsnium, seldnium, selrnium, sel4nium, sel3nium, selebium, selemium, selejium, selehium, selenuum, selenjum, selenkum, selenoum, selen9um, selen8um, seleniym, selenihm, selenijm, seleniim, seleni8m, seleni7m, seleniun, seleniuk, seleniuj, elenium, slenium, seenium, selnium, seleium, selenum, selenim, seleniu, eslenium, sleenium, seelnium, selneium, seleinum, selenuim, selenimu, sselenium, seelenium, sellenium, seleenium, selennium, seleniium, seleniuum, seleniumm
