バークリウム
97
Bk
族
該当なし
周期
7
ブロック
f
陽子
電子
中性子
97
97
150
一般特性
原子番号
97
原子量
[247]
質量数
247
カテゴリ
アクチノイド
色
該当なし
放射性
はい
Named after Berkeley, California, the city of its discovery
結晶構造
六方最密構造
歴史
Berkelium was discovered by Glenn T. Seaborg, Albert Ghiorso and Stanley G. Thompson in 1949 at the University of California, Berkeley.
It was produced by the bombardment of americium with alpha particles.
Berkelium was isolated in greater quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
It was produced by the bombardment of americium with alpha particles.
Berkelium was isolated in greater quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
電子殻
2, 8, 18, 32, 27, 8, 2
電子配置
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
物理特性
相
固体
密度
14.78 g/㎝3
融点
1259.15 K | 986 °C | 1806.8 °F
沸点
3173.15 K | 2900 °C | 5252 °F
融解熱
該当なし
蒸発熱
該当なし
熱容量
-
地殻中における存在比
該当なし
宇宙空間における存在比
該当なし
画像の出典: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS登録番号
7440-40-6
PubChem CID番号
23971
原子特性
原子半径
170 pm
共有結合半径
-
電気陰性度
1.3 (ポーリングの値)
イオン化エネルギー
6.1979 eV
モル体積
16.7 ㎝3/mol
熱伝導率
0.1 W/㎝·K
酸化数
3, 4
用途
Berkelium is mainly used for scientific research purposes.
Berkelium-249 is a common target nuclide to prepare still heavier transuranic elements and transactinides, such as lawrencium, rutherfordium and bohrium.
It is also useful as a source of the isotope californium-249.
Berkelium-249 is a common target nuclide to prepare still heavier transuranic elements and transactinides, such as lawrencium, rutherfordium and bohrium.
It is also useful as a source of the isotope californium-249.
Berkelium is harmful due to its radioactivity
同位体
安定同位体
-不安定同位体
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk