Seryum
58
Ce
Grup
yok
Periyot
6
Blok
f
Protonlar
Elektronlar
Nötronlar
58
58
82
Temel Özellikleri
Atom numarası
58
Atom ağırlığı
140,116
Kütle Numarası
140
Kategori
Lantanit
Renk
Gümüşi
Radyoaktif
Hayir
Cerium was named for the asteroid Ceres
Kristal yapısı
Basit altıgen
Tarihi
Jöns Jakob Berzelius and Wilhelm Hisinger discovered the element in ceria in 1803 in Sweden.
Klaproth discovered it simultaneously and independently in some tantalum samples in Germany.
Carl Gustaf Mosander, who worked closely with Berzelius, prepared metallic cerium in 1825.
Klaproth discovered it simultaneously and independently in some tantalum samples in Germany.
Carl Gustaf Mosander, who worked closely with Berzelius, prepared metallic cerium in 1825.
Enerji seviyesi başına Elektronlar
2, 8, 18, 19, 9, 2
Elektron dizilimi
[Xe] 4f1 5d1 6s2
Seawater contains 1.5 parts per trillion of cerium
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
6,77 g/cm3
Ergime noktası
1068,15 K | 795 °C | 1463 °F
Kaynama noktası
3716,15 K | 3443 °C | 6229,4 °F
Ergime ısısı
5,5 kJ/mol
Buharlaşma ısısı
350 kJ/mol
Isı kapasitesi
0,192 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,006%
Evrendeki bulunulabilirliği
1×10-6%
CAS Numarası
7440-45-1
PubChem CID Numarası
23974
Atom Özellikleri
Atom yarıçapı
182 pm
Kovalent yarıçapı
204 pm
Elektronegatifliği
1,12 (Pauling ölçeği)
İyonlaşma enerjisi
5,5387 eV
Atomik Hacim
20,67 cm3/mol
Isıl iletkenlik
0,114 W/cm·K
Yükseltgenme seviyeleri
2, 3, 4
Uygulamalar
Cerium is used in carbon-arc lighting, especially in the motion picture industry.
Cerium oxide is an important component of glass polishing powders and phosphors used in screens and fluorescent lamps.
Cerium compounds are also used in the manufacture of glass, both as a component and as a decolorizer.
Cerium oxide is an important component of glass polishing powders and phosphors used in screens and fluorescent lamps.
Cerium compounds are also used in the manufacture of glass, both as a component and as a decolorizer.
Cerium is considered to be moderately toxic
İzotoplar
Kararlı izotoplar
136Ce, 138Ce, 140Ce, 142CeKararsız izotoplar
119Ce, 120Ce, 121Ce, 122Ce, 123Ce, 124Ce, 125Ce, 126Ce, 127Ce, 128Ce, 129Ce, 130Ce, 131Ce, 132Ce, 133Ce, 134Ce, 135Ce, 137Ce, 139Ce, 141Ce, 143Ce, 144Ce, 145Ce, 146Ce, 147Ce, 148Ce, 149Ce, 150Ce, 151Ce, 152Ce, 153Ce, 154Ce, 155Ce, 156Ce, 157Ce