鐨
100
Fm
族
無法計量
週期
7
區
f
個質子
電子
個中子
100
100
157
一般屬性
原子序數
100
標準原子質量
[257]
品質編號
257
類別
錒系元素
顏色
無法計量
放射性
是
Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics
晶體結構
無法計量
歷史
Fermium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.
It was identified by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.
The new element was produced by the nuclear fission of 17 neutrons with uranium-238.
It was identified by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.
The new element was produced by the nuclear fission of 17 neutrons with uranium-238.
每個外殼的電子
2, 8, 18, 32, 30, 8, 2
電子排布
[Rn] 5f12 7s2
Sixteen isotopes of fermium are known to exist
物理性質
物態
固體
密度
-
熔點
1800.15 K | 1527 °C | 2780.6 °F
沸點
-
熔化熱
無法計量
汽化熱
無法計量
比熱容
-
地殼豐度
無法計量
宇宙豐度
無法計量
圖片來源: Wikimedia Commons (National Nuclear Security Administration)
Fermium was first observed in the fallout from the Ivy Mike nuclear test
CAS 編號
7440-72-4
Pubchem CID 編號
無法計量
原子性質
原子半徑
-
共價半徑
-
電負性
1.3 (鲍林标度)
電離電位
6.5 eV
原子體積
29.1 cm3/mol
熱導率
0.1 W/cm·K
氧化態
2, 3
應用
Fermium is used for scientific research purposes only.
Fermium is harmful due to its radioactivity
同位素
穩定同位素
-不穩定同位素
241Fm, 242Fm, 243Fm, 244Fm, 245Fm, 246Fm, 247Fm, 248Fm, 249Fm, 250Fm, 251Fm, 252Fm, 253Fm, 254Fm, 255Fm, 256Fm, 257Fm, 258Fm, 259Fm, 260Fm