Berkelium
97
Bk
Golongan
n/a
Periode
7
Blok
f
Proton
Elektron
Neutron
97
97
150
Sifat Umum
Nomor atom
97
Massa atom
[247]
Nomor massa
247
Kategori
Aktinida
Warna
n/a
Radioaktif
Ya
Named after Berkeley, California, the city of its discovery
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 32, 27, 8, 2
Konfigurasi elektron
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Sifat Fisika
Fase
Solid
Kepadatan
14,78 g/cm3
Titik lebur
1259,15 K | 986 °C | 1806,8 °F
Titik didih
3173,15 K | 2900 °C | 5252 °F
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Kredit Gambar: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
Nomor CAS
7440-40-6
Nomor PubChem CID
23971
Sifat Atom
Jari-jari atom
170 pm
Jari-jari kovalen
-
Elektronegativitas
1,3 (Skala Pauling)
Potensi Ionisasi
6,1979 eV
Volume atom
16,7 cm3/mol
Kondusivitas termal
0,1 W/cm·K
Bilangan oksidasi
3, 4
Aplikasi
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
Isotop
Isotop stabil
-Isotop tidak stabil
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk