Berkelyum
97
Bk
Grup
yok
Periyot
7
Blok
f
Protonlar
Elektronlar
Nötronlar
97
97
150
Temel Özellikleri
Atom numarası
97
Atom ağırlığı
[247]
Kütle Numarası
247
Kategori
Aktinit
Renk
yok
Radyoaktif
Evet
Named after Berkeley, California, the city of its discovery
Kristal yapısı
Basit altıgen
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 32, 27, 8, 2
Elektron dizilimi
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
14,78 g/cm3
Ergime noktası
1259,15 K | 986 °C | 1806,8 °F
Kaynama noktası
3173,15 K | 2900 °C | 5252 °F
Ergime ısısı
yok
Buharlaşma ısısı
yok
Isı kapasitesi
-
Dünya kabuğundaki bulunulabilirliği
yok
Evrendeki bulunulabilirliği
yok
Resim kaynağı: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS Numarası
7440-40-6
PubChem CID Numarası
23971
Atom Özellikleri
Atom yarıçapı
170 pm
Kovalent yarıçapı
-
Elektronegatifliği
1,3 (Pauling ölçeği)
İyonlaşma enerjisi
6,1979 eV
Atomik Hacim
16,7 cm3/mol
Isıl iletkenlik
0,1 W/cm·K
Yükseltgenme seviyeleri
3, 4
Uygulamalar
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
İzotoplar
Kararlı izotoplar
-Kararsız izotoplar
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk