Kobalto
27
Co
Grupo
9
Perio
4
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
27
27
32
Ĝeneralaj Propraĵoj
Atoma Nombro
27
Atommaso
58,933195
Amasa Nombro
59
Kategorio
Transirmetaloj
Koloro
Griza
Radioaktiva
Ne
From the German word Kobald, goblin or evil spirit; also from the Greek cobalos, mine
Kristala Strukturo
Simpla Sesangula
Historio
Cobalt compounds have been used for centuries to impart a rich blue color to glass, glazes and ceramics.
The element was first isolated by Swedish chemist George Brandt in 1735.
He showed it was the presence of the element cobalt that caused the blue color in glass, not bismuth as previously thought.
The element was first isolated by Swedish chemist George Brandt in 1735.
He showed it was the presence of the element cobalt that caused the blue color in glass, not bismuth as previously thought.
Elektronoj per ŝelo
2, 8, 15, 2
Elektrona Agordo
[Ar] 3d7 4s2
Supplemental colbalt is essential in sheep's diets to improve the wools quality
Fizikaj Propraĵoj
Fazo
Solido
Denso
8,86 g/cm3
Fandpunkto
1768,15 K | 1495 °C | 2723 °F
Bolpunkto
3200,15 K | 2927 °C | 5300,6 °F
Varmo de Fuzio
16,2 kJ/mol
Varmo de Vaporiĝo
375 kJ/mol
Specifa Varmo Kapacito
0,421 J/g·K
Krusta Abundo
0,003%
Universa Abundo
0,0003%
Bildaj kreditoj: Wikimedia Commons (Alchemist-hp)
Pure cobalt chips, electrolytically refined, as well as a high purity cobalt cube for comparison
CAS Nombro
7440-48-4
PubChem Kunmetita Identiga Nombro
104730
Atomaj Propraĵoj
Atoma Radiuso
125 pm
Kovalenta Radiuso
126 pm
Elektronegativeco
1,88 (Pauling-skalo)
Potencialo de jonigo
7,881 eV
Atoma Volumo
6,7 cm3/mol
Termika Kondukto
1 W/cm·K
Oksidaj Ŝtatoj
-1, 1, 2, 3, 4, 5
Aplikoj
Cobalt is used in the preparation of magnetic, wear-resistant and high-strength alloys.
Cobalt is widely used in batteries and in electroplating.
Radioactive 60Co is used in the treatment of cancer.
A solution of the chloride is used as a sympathetic ink.
Cobalt is widely used in batteries and in electroplating.
Radioactive 60Co is used in the treatment of cancer.
A solution of the chloride is used as a sympathetic ink.
Cobalt and its compounds are considered to be slightly toxic
Izotopoj
Stabilaj Izotopoj
59CoMalstabilaj Isotopoj
47Co, 48Co, 49Co, 50Co, 51Co, 52Co, 53Co, 54Co, 55Co, 56Co, 57Co, 58Co, 60Co, 61Co, 62Co, 63Co, 64Co, 65Co, 66Co, 67Co, 68Co, 69Co, 70Co, 71Co, 72Co, 73Co, 74Co, 75Co