39
Y
3
週期
5
d
個質子
電子
個中子
39
39
50
一般屬性
原子序數
39
標準原子質量
88.90585
品質編號
89
類別
過渡金屬
顏色
銀色
放射性
Named after Ytterby, a village in Sweden near Vauxholm
晶體結構
簡單六角形
歷史
In 1787, Carl Axel Arrhenius found a new mineral near Ytterby in Sweden and named it ytterbite, after the village.

Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, and Anders Gustaf Ekeberg named the new oxide yttria.

Elemental yttrium was first isolated in 1828 by Friedrich Wöhler.
每個外殼的電子
2, 8, 18, 9, 2
電子排布
[Kr] 4d1 5s2
Y
Finely divided yttrium is very unstable in air
物理性質
物態
固體
密度
4.469 g/cm3
熔點
1799.15 K | 1526 °C | 2778.8 °F
沸點
3609.15 K | 3336 °C | 6036.8 °F
熔化熱
11.4 kJ/mol
汽化熱
380 kJ/mol
比熱容
0.298 J/g·K
地殼豐度
0.0029%
宇宙豐度
7×10-7%
High
圖片來源: Wikimedia Commons (Alchemist-hp)
High purity yttrium
CAS 編號
7440-65-5
Pubchem CID 編號
23993
原子性質
原子半徑
180 pm
共價半徑
190 pm
電負性
1.22 (鲍林标度)
電離電位
6.2173 eV
原子體積
19.8 cm3/mol
熱導率
0.172 W/cm·K
氧化態
1, 2, 3
應用
Yttrium is often used in alloys, increasing the strength of aluminum and magnesium alloys.

Yttrium is one of the elements used to make the red color in CRT televisions.

It is also used as a deoxidizer for non-ferrous metals such as vanadium.

Yttrium can be used in laser systems and as a catalyst for ethylene polymerization reactions.
Exposure to yttrium compounds in humans may cause lung disease
同位素
穩定同位素
89Y
不穩定同位素
76Y, 77Y, 78Y, 79Y, 80Y, 81Y, 82Y, 83Y, 84Y, 85Y, 86Y, 87Y, 88Y, 90Y, 91Y, 92Y, 93Y, 94Y, 95Y, 96Y, 97Y, 98Y, 99Y, 100Y, 101Y, 102Y, 103Y, 104Y, 105Y, 106Y, 107Y, 108Y