63
Eu
無法計量
週期
6
f
個質子
電子
個中子
63
63
89
一般屬性
原子序數
63
標準原子質量
151.964
品質編號
152
類別
鑭系元素
顏色
銀色
放射性
Europium was named after Europe
晶體結構
Body Centered Cubic
歷史
Europium was first found by Paul Émile Lecoq de Boisbaudran in 1890.

In 1896, French chemist Eugène-Antole Demarçay identified spectroscopic lines in ‘samarium' caused by europium.

He successfully isolated europium in 1901 using repeated crystallizations of samarium magnesium nitrate.
每個外殼的電子
2, 8, 18, 25, 8, 2
電子排布
[Xe] 4f7 6s2
Eu
Europium is the most reactive rare earth element
物理性質
物態
固體
密度
5.243 g/cm3
熔點
1099.15 K | 826 °C | 1518.8 °F
沸點
1802.15 K | 1529 °C | 2784.2 °F
熔化熱
9.2 kJ/mol
汽化熱
175 kJ/mol
比熱容
0.182 J/g·K
地殼豐度
0.00018%
宇宙豐度
5×10-8%
Weakly
圖片來源: Images-of-elements
Weakly oxidized europium, hence slightly yellowish
CAS 編號
7440-53-1
Pubchem CID 編號
23981
原子性質
原子半徑
180 pm
共價半徑
198 pm
電負性
1.2 (鲍林标度)
電離電位
5.6704 eV
原子體積
20.8 cm3/mol
熱導率
0.139 W/cm·K
氧化態
2, 3
應用
Europium is used in the manufacture of fluorescent glass.

It is also used in the anti-counterfeiting phosphors in Euro banknotes.

Europium-doped plastic has been used as a laser material.

Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
Europium is considered to be mildly toxic
同位素
穩定同位素
151Eu, 153Eu
不穩定同位素
130Eu, 131Eu, 132Eu, 133Eu, 134Eu, 135Eu, 136Eu, 137Eu, 138Eu, 139Eu, 140Eu, 141Eu, 142Eu, 143Eu, 144Eu, 145Eu, 146Eu, 147Eu, 148Eu, 149Eu, 150Eu, 152Eu, 154Eu, 155Eu, 156Eu, 157Eu, 158Eu, 159Eu, 160Eu, 161Eu, 162Eu, 163Eu, 164Eu, 165Eu, 166Eu, 167Eu