Kobalt
27
Co
Grup
9
Periyot
4
Blok
d
Protonlar
Elektronlar
Nötronlar
27
27
32
Temel Özellikleri
Atom numarası
27
Atom ağırlığı
58,933195
Kütle Numarası
59
Kategori
Geçiş metalleri
Renk
Gri
Radyoaktif
Hayir
From the German word Kobald, goblin or evil spirit; also from the Greek cobalos, mine
Kristal yapısı
Basit altıgen
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 15, 2
Elektron dizilimi
[Ar] 3d7 4s2
Supplemental colbalt is essential in sheep's diets to improve the wools quality
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
8,86 g/cm3
Ergime noktası
1768,15 K | 1495 °C | 2723 °F
Kaynama noktası
3200,15 K | 2927 °C | 5300,6 °F
Ergime ısısı
16,2 kJ/mol
Buharlaşma ısısı
375 kJ/mol
Isı kapasitesi
0,421 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,003%
Evrendeki bulunulabilirliği
0,0003%
Resim kaynağı: Wikimedia Commons (Alchemist-hp)
Pure cobalt chips, electrolytically refined, as well as a high purity cobalt cube for comparison
CAS Numarası
7440-48-4
PubChem CID Numarası
104730
Atom Özellikleri
Atom yarıçapı
125 pm
Kovalent yarıçapı
126 pm
Elektronegatifliği
1,88 (Pauling ölçeği)
İyonlaşma enerjisi
7,881 eV
Atomik Hacim
6,7 cm3/mol
Isıl iletkenlik
1 W/cm·K
Yükseltgenme seviyeleri
-1, 1, 2, 3, 4, 5
Uygulamalar
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
İzotoplar
Kararlı izotoplar
59CoKararsız izotoplar
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