Dubniy
105
Db
Guruh
5
Davr
7
Block
d
Protonlar
Elektronlar
Neytronlar
105
105
157
General Properties
Atom raqami
105
Atom massasi
[268]
Mass Number
262
Turkum
Oʻtish metallar
Ranggi
Nomaʼlum
Radioaktivlik
Ha
Named after the Russian town of Dubna
Crystal Structure
Nomaʼlum
Tarix
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.
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.
Electrons per shell
2, 8, 18, 32, 32, 11, 2
Elektron konfiguratsiyasi
[Rn] 5f14 6d3 7s2
The Berkeley team proposed the name hahnium for the element
Physical Properties
Phase
Qattiq modda
Zichlik
39 g/cm3
Erish harorati
-
Qaynash harorati
-
Heat of Fusion
Nomaʼlum
Heat of Vaporization
Nomaʼlum
Solishtirma issiqlik sigʻimi
-
Abundance in Earth's crust
Nomaʼlum
Abundance in Universe
Nomaʼlum
Image Credits: Wikimedia Commons (Hrustov)
The element is named after after the Russian town of Dubna, the location of the Joint Institute for Nuclear Research
CAS Number
53850-35-4
PubChem CID Number
Nomaʼlum
Atomic Properties
Atom radiusi
-
Kovalentlik radiusi
149 pm
Elektrmanfiylik
-
Ionization Potential
-
Molyar hajm
-
Issiqlik oʻtkazuvchanlik
0,58 W/cm·K
Oksidlanish darajasi
5
Applications
Dubnium is used for scientific research purposes only.
Dubnium is harmful due to its radioactivity
Izotoplar
Barqaror izotoplar
-Beqaror izotoplar
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db