Kalifornium

98
Cf
Kumpulan
Tiada
Kala
7
Blok
f
Proton
Elektron
Neutron
98
98
153
Ciri-Ciri Am
Nombor atom
98
Berat atom
[251]
Nombor jisim
251
Kategori
Aktinid
Warna
Tiada
Radioaktif
Ya
Named after California and the University of California
Struktur hablur
Hexagonal Ringkas
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 32, 28, 8, 2
Konfigurasi elektron
[Rn] 5f10 7s2
Cf
Californium is produced in nuclear reactors and particle accelerators
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
15.1 g/cm3
Takat lebur
1173.15 K | 900 °C | 1652 °F
Takat didih
-
Haba pelakuran
Tiada
Haba pengewapan
Tiada
Muatan haba molar
-
Banyak pada kerak bumi
Tiada
Banyak pada alam semesta
Tiada
Illustration
Kredit imej: Images-of-elements
Illustration of californium
Nombor CAS
7440-71-3
PubChem CID Number
Tiada
Ciri-Ciri Atom
Jejari atom
-
Jejari kovalen
-
Keelektronegatifan
1.3 (Skala Pauling)
Kebolehan mengion
6.2817 eV
Isipadu atom
18.4 cm3/mol
Daya pengaliran terma
0.1 W/cm·K
Keadaan pengoksidaan
2, 3, 4
Aplikasi
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.
Californium is harmful due to its radioactivity
Isotop
Isotop stabil
-
Isotop tidak stabil
237Cf, 238Cf, 239Cf, 240Cf, 241Cf, 242Cf, 243Cf, 244Cf, 245Cf, 246Cf, 247Cf, 248Cf, 249Cf, 250Cf, 251Cf, 252Cf, 253Cf, 254Cf, 255Cf, 256Cf