General Information
| Symbol: | Ra |
| Atomic Number: | 88 |
| Atomic Weight: (Atomic Mass, Molar Mass) | (226) |
| Group: | 2 (alkaline earth metals or beryllium family) |
| IIA (Old IUPAC), IIA (CAS) |
| Period: | 7 |
| Block: | s |
Physical Properties
| Density: | 5.0 g/cm3 |
| Atomic Volume: | 45.2 cm3/mole |
| Atomic Radius: | 2.33 angstroms |
| Covalent Radius: | pm |
| Radioactive: | Yes |
States
| Melting Point: | 700.0 °C |
| Boiling Point: | 1140.0 °C |
| Heat Of Fusion: | 8.37 kJ/mole |
| Heat Of Vaporization: | 136.82 kJ/mole |
Electrons & Oxidation
| Oxidation States: | 2 |
| Electrons Per Shell: | 2 8 18 32 18 8 2 |
| Electron Configuration: | [Rn] 7s2 |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 7s2 |
Energy
| Electronegativity: | 0.9 (Pauling Scale) |
| Electron Affinity: | kJ/mol |
| 1st Ionization Energy: | 509 kJ/mol |
| Specific Heat Capacity: | 0.094 J g−1 K−1 |
| Thermal Conductivity: | 18.6 W·m−1·K−1 |
History
| Discovered In: | 1898 |
| Discovered By: | Pierre and Marie Curie |
| Discovered At: | France |
| Word Origin: | From the Latin word "radius" meaning "ray" |
Translations
| English | Radium |
| Deutsch | Radium |
| Lëtzebuergesch | Radium |
| Nederlands | Radium |
| Afrikaans | Radium |
| Frysk | Radium |
| Dansk | Radium |
| Svenska | Radium |
| Norsk | Radium |
| Íslenska | Radín |
| Føroysk | Radium |
| Latin | Radium |
| Français | Radium |
| Español | Radio |
| Catalana | Radi |
| Occitana | Radi |
| Português | Rádio |
| Galego | Radio |
| Italiano | Radio |
| Furlan | Radi |
| Român | Radiu |
| Moldavian | Radiu |
| Armãneashte | Radiumu |
| Русский | ? адий |
| Українска | ? адій |
| by | ? адый |
| Polska | Rad |
| Kaszëbsczi | Rôd |
| Čech | Radium |
| Slovenský | Radium |
| Slovenščina | Radij |
| Hrvatska | Radij |
| Српски | ? адиjум |
| Bosnian | Radij |
| Македонски | ? адиум |
| Български | ? адий |
| Lietuviškai | Radis |
| Lao | Rādijs |
| Sudovian | Radijan |
| Cymraeg | Radiwm |
| Gaeilge na hÉireann | Raidiam |
| Gàidhlig na h | Raidiam |
| Gaelg Vanninagh | Raadjum |
| Cornish | Radyum |
| Brezhoneg | Radiom |
| Ελληνική | Ραδιο |
| Shqip | Radium |
| Ossetian | ? адий |
| Euskera | Radioa |
| Georgian | ? ადიუმი |
| Suomi | Radium |
| Eesti | Raadium |
| Magyar | Rádium |
| Türkçe | Radyum |
| Kazakh | ? адий |
| Uzbek | ? адий |
| Tajik | Radi' |
| Mongolian | ? ади |
| 日本語 | ラジウ? [rajiumu] |
| 中国话 | 鐳 |
| ไทย | ? ? ? ? ? ? ? |
| Vietnamese | Rađi |
| Bahasa Melayu | Radium |
| العربيه | راديوم |
| Il-Malti | Radjum |
| עברית | רדיום |
| Esperanto | Radiumo |
Links
Misspellings: rsdium, raddium, radimu, adium, rqdium, rasium, raidum, radihm, rdium, fadium, raium, tadium, raxium, radi8m, rwdium, dadium, radjum, radoum, raeium, radijm, rafium, 4adium, radi7m, radiuk, radiu, rad9um, radiium, radiun, eadium, radiym, radiumm, raduim, rad8um, ardium, radiim, 5adium, radkum, rradium, radim, racium, raduum, raadium, radiuum, radum, rarium, radiuj, rzdium, rdaium
