Rubidium

37
Rb
Kumpulan
1
Kala
5
Blok
s
Proton
Elektron
Neutron
37
37
48
Ciri-Ciri Am
Nombor atom
37
Berat atom
85.4678
Nombor jisim
85
Kategori
Logam alkali
Warna
Perak
Radioaktif
Tidak
From the Latin word rubidus, deepest red
Struktur hablur
Pusat Badan Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 8, 1
Konfigurasi elektron
[Kr] 5s1
Rb
Rubidium burns with a reddish-violet flame color
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
1.532 g/cm3
Takat lebur
312.46 K | 39.31 °C | 102.76 °F
Takat didih
961.15 K | 688 °C | 1270.4 °F
Haba pelakuran
2.19 kJ/mol
Haba pengewapan
72 kJ/mol
Muatan haba molar
0.363 J/g·K
Banyak pada kerak bumi
0.006%
Banyak pada alam semesta
1×10-6%
Rubidium
Kredit imej: Wikimedia Commons (Dnn87)
Rubidium metal sample from the Dennis s.k collection
Nombor CAS
7440-17-7
PubChem CID Number
5357696
Ciri-Ciri Atom
Jejari atom
248 pm
Jejari kovalen
220 pm
Keelektronegatifan
0.82 (Skala Pauling)
Kebolehan mengion
4.1771 eV
Isipadu atom
55.9 cm3/mol
Daya pengaliran terma
0.582 W/cm·K
Keadaan pengoksidaan
-1, 1
Aplikasi
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 is not known to be toxic
Isotop
Isotop stabil
85Rb
Isotop tidak stabil
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