# Rubidium

SIMS Massenspektrum fon do Isotope

| Oainskuppe |
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[Kr] 5s1
37
Rb
Periodensystem . . . . . . . . . . Klik ap sun litje Blok foar n uur Element |

 |
| Algemeen |
| Noome, Symbol, Oardnengstaal | Rubidium, Rb, 37 |
| Serie | Alkalimetalle |
| Gruppe, Periode, Blok | 1, 5, s |
| Uutsjoon | säälwersk wiet |
| Massenandeel an ju Äidhülle | 0,03 % |
| Atomar |
| Atommasse | 85,4678 u |
| Atomradius (bereekend) | 235 (265) pm |
| Kovalenten Radius | 211 pm |
| Van-der-Waals-Radius | 244 pm |
| Elektronekonfiguration | [Kr] 5s1 |
| Elektrone pro Energieniveau | 2, 8, 18, 8, 1 |
| Uuttreedoarbaid | 2,13 eV |
| 1. Ionisierungsenergie | 403,0 kJ/mol |
| Physikalisk |
| Aggregoattoustand | fääst |
| Modifikationen | 1 |
| Kristallstruktuur | kubisk ruumzentrierd |
| Tichte | 1,532 g/cm3 |
| Mohshädde | 0,3 |
| Magnetismus | paramagnetisk |
| Smiltpunkt | 312,46 K (39,31 °C) |
| Sjoodepunkt | 961 K (688 °C) |
| Molar Volumen | 55,76 · 10-6 m3/mol |
| Ferdampengswaarmte | 72,216 kJ/mol |
| Smiltwaarmte | 2,192 kJ/mol |
| Dampdruk | 1,56 · 10-4 Pa bei 312,6 K |
| Skalgauegaid | 1300 m/s bei 293,15 K |
| Spezifiske Waarmtekapazität | 363 J/(kg · K) |
| Elektriske Laitfäiegaid | 7,79 · 106 S/m |
| Waarmtelaitfäiegaid | 58,2 W/(m · K) |
| Chemisk |
| Oxidationstoustande | +1 |
| Oxide (Basizität) | Rb2O (stäärk basisk) |
| Normoalpotentioal | -2,98 V (Rb+ + e- → Rb) |
| Elektronegativität | 0,82 (Pauling-Skala) |
| Isotope |
|

| Isotop | NH | t1/2 | ZM | ZE MeV | ZP |
| --- | --- | --- | --- | --- | --- |
| 83Rb |
{syn.}
 |  86,2 d  | ε | 0,910 | 83Kr |
| 84Rb |
{syn.}
 |  32,77 d  | ε | 2,681 | 84Kr |
| β- | 0,894 | 84Sr |
| 85Rb | **72,168** %
 |  Stabil |
| 86Rb |
{syn.}
 |  18,631 d  | β- | 1,775 | 86Sr |
| 87Rb |
27,835 %
 |  4,7 · 1010 a  | β- | 0,283 | 87Sr |
| 88Rb |
{syn.}
 |  17,78 min  | β- | 5,316 | 88Sr |
| 89Rb |
{syn.}
 |  15,15 min  | β- | 4,501 | 89Sr |

 |
| NMR-Oainskuppe |
|

|   | Spin | γ in rad·T−1·s−1 | E | fL bei B = 4,7 T in MHz |
| --- | --- | --- | --- | --- |
| **85Rb** | 5/2 | 2,583 · 107 | 0,0105 | 19,3 |
| **87Rb** | 3/2 | 8,753 · 107 | 0,175 | 65,4 |

 |
| Sicherhaidswaiwiesengen |
| Gefoarstofkänteekenge |
|

|  |  |
| --- | --- |
|
 F Leichtent- zündlich |
 C Äisjend |

 |
| R- und S-Sätze | R: Foarloage:R-Sätze |
| S: Foarloage:S-Sätze |
| Sowied muugelk un gebruukelk, wäide SI-Eenhaide ferwoand. Wan nit uurs fermäärkt, jäilde do anroate Doaten bie Standoardbedingengen. |

**Rubidium** (lat. *rubidus*: jooprood; weegen two charakteristiske roode Spektrallienjen) is n chemisk Element mäd dät Elementsymbol Rb un ju Oardnengstaal 37. In dät Periodensystem stoant et in ju 1. Haudgruppe un tält tou do Alkalimetalle. Dät wooke, säälwerichwiet glansjende Metal stikt sik sälwen spontoan an bie Lufttouträt.

## Ätterwiese