Kalifornium

98
Cf
Golongan
n/a
Periode
7
Blok
f
Proton
Elektron
Neutron
98
98
153
Sifat Umum
Nomor atom
98
Massa atom
[251]
Nomor massa
251
Kategori
Aktinida
Warna
n/a
Radioaktif
Ya
Named after California and the University of California
Struktur kristal
Segienam Sederhana
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.
Elektron per kulit
2, 8, 18, 32, 28, 8, 2
Konfigurasi elektron
[Rn] 5f10 7s2
Cf
Californium is produced in nuclear reactors and particle accelerators
Sifat Fisika
Fase
Solid
Kepadatan
15,1 g/cm3
Titik lebur
1173,15 K | 900 °C | 1652 °F
Titik didih
-
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Illustration
Kredit Gambar: Images-of-elements
Illustration of californium
Nomor CAS
7440-71-3
PubChem CID Number
n/a
Sifat Atom
Jari-jari atom
-
Jari-jari kovalen
-
Elektronegativitas
1,3 (Skala Pauling)
Potensi Ionisasi
6,2817 eV
Volume atom
18,4 cm3/mol
Kondusivitas termal
0,1 W/cm·K
Bilangan oksidasi
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