Rubidium
37
Rb
Gruppe
1
Periode
5
Blok
s
Protoner
Elektroner
Neutroner
37
37
48
Generelle Egenskaber
Atomnummer
37
Atommasse
85,4678
Masseantal
85
Kategori
Alkalimetaller
Farve
Sølv
Radioaktiv
Nej
From the Latin word rubidus, deepest red
Krystalstruktur
Rumcentreret Kubisk
Historie
German chemists Robert Bunsen and Gustav Kirchhoff discovered rubidium in 1861 by the newly developed method of flame spectroscopy.
The separation of the metal was tried by Bunsen, but he never got samples with more than 18% of Rubidium.
The separation of the metal was only accomplished by George de Hevesy, through the hydrolysis of melted rubidium hydroxide.
The separation of the metal was tried by Bunsen, but he never got samples with more than 18% of Rubidium.
The separation of the metal was only accomplished by George de Hevesy, through the hydrolysis of melted rubidium hydroxide.
Elektroner i hver skal
2, 8, 18, 8, 1
Elektronkonfiguration
[Kr] 5s1
Rubidium burns with a reddish-violet flame color
Fysiske Egenskaber
Tilstandsform
Fast stof
Massefylde
1,532 g/cm3
Smeltepunkt
312,46 K | 39,31 °C | 102,76 °F
Kogepunkt
961,15 K | 688 °C | 1270,4 °F
Smeltevarme
2,19 kJ/mol
Fordampningsvarme
72 kJ/mol
Varmefylde
0,363 J/g·K
Forekomst i jordskorpen
0,006%
Forekomst i universet
1×10-6%
Billede akkrediteringer: Wikimedia Commons (Dnn87)
Rubidium metal sample from the Dennis s.k collection
CAS-nummer
7440-17-7
PubChem CID-nummer
5357696
Atomare egenskaber
Atomradius
248 pm
Kovalent radius
220 pm
Elektronegativitet
0,82 (Paulings skala)
Ioniseringspotentiale
4,1771 eV
Atomvolumen
55,9 cm3/mol
Varmeledningsevne
0,582 W/cm·K
Oxidationstrin
-1, 1
Anvendelser
Rubidium is used as a getter in vacuum tubes and as a photocell component.
Rubidium compounds are sometimes used in fireworks to give them a purple color.
Rubidium salts are used in glasses and ceramics.
Rubidium-87 is slightly radioactive and has been used extensively in dating rocks.
Rubidium compounds are sometimes used in fireworks to give them a purple color.
Rubidium salts are used in glasses and ceramics.
Rubidium-87 is slightly radioactive and has been used extensively in dating rocks.
Rubidium is not known to be toxic
Isotoper
Stabile isotoper
85RbUstabile isotoper
71Rb, 72Rb, 73Rb, 74Rb, 75Rb, 76Rb, 77Rb, 78Rb, 79Rb, 80Rb, 81Rb, 82Rb, 83Rb, 84Rb, 86Rb, 87Rb, 88Rb, 89Rb, 90Rb, 91Rb, 92Rb, 93Rb, 94Rb, 95Rb, 96Rb, 97Rb, 98Rb, 99Rb, 100Rb, 101Rb, 102Rb