Dubnium

105
Db
Kumpulan
5
Kala
7
Blok
d
Proton
Elektron
Neutron
105
105
157
Ciri-Ciri Am
Nombor atom
105
Berat atom
[268]
Nombor jisim
262
Kategori
Logam peralihan
Warna
Tiada
Radioaktif
Ya
Named after the Russian town of Dubna
Struktur hablur
Tiada
Sejarah
Dubnium was reportedly first discovered in 1968 at the Joint Institute for Nuclear Research at Dubna.

Researchers there bombarded an americium-243 target with neon-22 ions.

In the same year, a team led by Albert Ghiorso working at the University of California, Berkeley conclusively synthesized the element by bombarding a californium-249 target with nitrogen-15 ions.
Bilangan elektron per petala
2, 8, 18, 32, 32, 11, 2
Konfigurasi elektron
[Rn] 5f14 6d3 7s2
Db
The Berkeley team proposed the name hahnium for the element
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
39 g/cm3
Takat lebur
-
Takat didih
-
Haba pelakuran
Tiada
Haba pengewapan
Tiada
Muatan haba molar
-
Banyak pada kerak bumi
Tiada
Banyak pada alam semesta
Tiada
The
Kredit imej: Wikimedia Commons (Hrustov)
The element is named after after the Russian town of Dubna, the location of the Joint Institute for Nuclear Research
Nombor CAS
53850-35-4
PubChem CID Number
Tiada
Ciri-Ciri Atom
Jejari atom
-
Jejari kovalen
149 pm
Keelektronegatifan
-
Kebolehan mengion
-
Isipadu atom
-
Daya pengaliran terma
0.58 W/cm·K
Keadaan pengoksidaan
5
Aplikasi
Dubnium is used for scientific research purposes only.
Dubnium is harmful due to its radioactivity
Isotop
Isotop stabil
-
Isotop tidak stabil
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db