58
Ce
無法計量
週期
6
f
個質子
電子
個中子
58
58
82
一般屬性
原子序數
58
標準原子質量
140.116
品質編號
140
類別
鑭系元素
顏色
銀色
放射性
Cerium was named for the asteroid Ceres
晶體結構
簡單六角形
歷史
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.
每個外殼的電子
2, 8, 18, 19, 9, 2
電子排布
[Xe] 4f1 5d1 6s2
Ce
Seawater contains 1.5 parts per trillion of cerium
物理性質
物態
固體
密度
6.77 g/cm3
熔點
1068.15 K | 795 °C | 1463 °F
沸點
3716.15 K | 3443 °C | 6229.4 °F
熔化熱
5.5 kJ/mol
汽化熱
350 kJ/mol
比熱容
0.192 J/g·K
地殼豐度
0.006%
宇宙豐度
1×10-6%
Ultrapure
圖片來源: Images-of-elements
Ultrapure cerium under argon
CAS 編號
7440-45-1
Pubchem CID 編號
23974
原子性質
原子半徑
182 pm
共價半徑
204 pm
電負性
1.12 (鲍林标度)
電離電位
5.5387 eV
原子體積
20.67 cm3/mol
熱導率
0.114 W/cm·K
氧化態
2, 3, 4
應用
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 is considered to be moderately toxic
同位素
穩定同位素
136Ce, 138Ce, 140Ce, 142Ce
不穩定同位素
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