Rubidium
37
Rb
Groep
1
Periode
5
Blok
s
Protrone
Elektrone
Neutrone
37
37
48
Algemene Eienskappe
Atoom Nommer
37
Atoommassa
85,4678
Massa Nommer
85
Kategorie
Alkalimetale
Kleur
Silver
Radioaktief
Nee
From the Latin word rubidus, deepest red
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 8, 1
Elektronkonfigurasie
[Kr] 5s1
Rubidium burns with a reddish-violet flame color
Fisiese Eienskappe
Fase
Soliede
Digtheid
1,532 g/cm3
Smeltpunt
312,46 K | 39,31 °C | 102,76 °F
Kookpunt
961,15 K | 688 °C | 1270,4 °F
Heat of Fusion
2,19 kJ/mol
Heat of Vaporization
72 kJ/mol
Spesifieke Hitte Kapasiteit
0,363 J/g·K
Oorvloed in die aardkors
0,006%
Oorvloed in die heelal
1×10-6%
CAS Nommer
7440-17-7
PubChem CID Nommer
5357696
Atomiese Eienskappe
Atoom radius
248 pm
Kovalente Radius
220 pm
Elektronegatiewiteit
0,82 (Pauling scale)
Ionisasie potensiaal
4,1771 eV
Atoom volume
55,9 cm3/mol
Termiese geleidingsvermoë
0,582 W/cm·K
Oksidasiestate
-1, 1
Toepassings
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
Isotope
Stabiele Isotope
85RbOnstabiele Isotope
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