カリホルニウム
98
Cf
族
該当なし
周期
7
ブロック
f
陽子
電子
中性子
98
98
153
一般特性
原子番号
98
原子量
[251]
質量数
251
カテゴリ
アクチノイド
色
該当なし
放射性
はい
Named after California and the University of California
結晶構造
六方最密構造
歴史
Californium was discovered by Stanley G. Thompson, Kenneth Street, Jr., Albert Ghiorso and Glenn T. Seaborg in 1950 at the University of California, Berkeley.
It was produced by the bombardment of curium with alpha particles.
Californium was isolated in macro quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
It was produced by the bombardment of curium with alpha particles.
Californium was isolated in macro quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
電子殻
2, 8, 18, 32, 28, 8, 2
電子配置
[Rn] 5f10 7s2
Californium is produced in nuclear reactors and particle accelerators
物理特性
相
固体
密度
15.1 g/㎝3
融点
1173.15 K | 900 °C | 1652 °F
沸点
-
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
CAS登録番号
7440-71-3
PubChem CID番号
該当なし
原子特性
原子半径
-
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
6.2817 eV
モル体積
18.4 ㎝3/mol
熱伝導率
0.1 W/㎝·K
酸化数
2, 3, 4
用途
Californium is used as a portable neutron source for discovery of metals such as gold or silver by on-the-spot activation analysis.
Neutrons from californium are employed as a treatment of certain cervical and brain cancers where other radiation therapy is ineffective.
Neutron moisture gauges use californium-252 to find water and petroleum layers in oil wells.
Neutrons from californium are employed as a treatment of certain cervical and brain cancers where other radiation therapy is ineffective.
Neutron moisture gauges use californium-252 to find water and petroleum layers in oil wells.
Californium is harmful due to its radioactivity
同位体
安定同位体
-不安定同位体
237Cf, 238Cf, 239Cf, 240Cf, 241Cf, 242Cf, 243Cf, 244Cf, 245Cf, 246Cf, 247Cf, 248Cf, 249Cf, 250Cf, 251Cf, 252Cf, 253Cf, 254Cf, 255Cf, 256Cf