General Information
| Symbol: | He |
| Atomic Number: | 2 |
| Atomic Weight: (Atomic Mass, Molar Mass) | 4.002602 |
| Group: | 18 (noble gases or helium family/neon family) |
| VIII (Old IUPAC), VIIIA (CAS) |
| Period: | 1 |
| Block: | s |
Physical Properties
| Density: | 0.000179 g/cm3 |
| Atomic Volume: | 31.8 cm2/mole |
| Atomic Radius: | angstroms |
| Covalent Radius: | 32 pm |
| Radioactive: | No |
States
| Melting Point: | -272.2 °C |
| Boiling Point: | -268.9 °C |
| Heat Of Fusion: | 0.021 kJ/mole |
| Heat Of Vaporization: | 0.0845 kJ/mole |
Energy
| Electronegativity: | (Pauling Scale) |
| Electron Affinity: | kJ/mol |
| 1st Ionization Energy: | 2377 kJ/mol |
| Specific Heat Capacity: | 5.193 J g−1 K−1 |
| Thermal Conductivity: | 0.152 W·m−1·K−1 |
Electrons & Oxidation
| Oxidation States: | 0 |
| Electrons Per Shell: | 2 |
| Electron Configuration: | 1s2 |
| 1s2 |
| 1s2 |
History
| Discovered In: | 1895 |
| Discovered By: | William Ramsay |
| Discovered At: | London, England |
| Word Origin: | From the Greek word "helios" meaning "sun" |
Translations
| English | Helium |
| Deutsch | Helium |
| Lëtzebuergesch | Helium |
| Nederlands | Helium |
| Afrikaans | Helium |
| Frysk | Helium |
| Dansk | Helium |
| Svenska | Helium |
| Norsk | Helium |
| Íslenska | Helín |
| Føroysk | Helium |
| Latin | Helium |
| Français | Hélium |
| Español | Helio |
| Catalana | Heli |
| Occitana | Eli |
| Português | Hélio |
| Galego | Helio |
| Italiano | Elio |
| Furlan | Eli |
| Român | Heliu |
| Moldavian | Heliu |
| Armãneashte | Heliumu |
| Русский | Гелий |
| Українска | Гелій |
| by | Гелій |
| Polska | Hel |
| Kaszëbsczi | Él |
| Čech | Helium |
| Slovenský | Hélium |
| Slovenščina | Helij |
| Hrvatska | Helij |
| Српски | Хелиjум |
| Bosnian | Helij |
| Македонски | Хелиум |
| Български | Хелий |
| Lietuviškai | Helis |
| Lao | Hēlijs |
| Sudovian | Helijan |
| Cymraeg | Heliwm |
| Gaeilge na hÉireann | Héiliam |
| Gàidhlig na h | Hèiliam |
| Gaelg Vanninagh | Hailium |
| Cornish | Helyum |
| Brezhoneg | Heliom |
| Ελληνική | Ήλιον |
| Shqip | Helium |
| Ossetian | Гелий |
| Euskera | Helioa |
| Georgian | ჰელიუმი |
| Suomi | Helium |
| Eesti | Heelium |
| Magyar | Hélium |
| Türkçe | Helyum |
| Kazakh | Гелий |
| Uzbek | Гелий |
| Tajik | Geli' |
| Mongolian | Гели |
| 日本語 | ヘリウム [heriumu] |
| 中国话 | 氦 |
| ไทย | ฮีเลียม |
| Vietnamese | Heli |
| Bahasa Melayu | Helium |
| العربيه | هيليوم |
| Il-Malti | Ħiljum |
| עברית | הליום |
| Esperanto | Helio |
Links
Misspellings: gelium, belium, nelium, jelium, uelium, yelium, hwlium, hslium, hdlium, hrlium, h4lium, h3lium, hekium, hepium, heoium, heluum, heljum, helkum, heloum, hel9um, hel8um, heliym, helihm, helijm, heliim, heli8m, heli7m, heliun, heliuk, heliuj, elium, hlium, heium, helum, helim, heliu, ehlium, hleium, heilum, heluim, helimu, hhelium, heelium, hellium, heliium, heliuum, heliumm
