Dubniy
105
Db
Guruh
5
Davr
7
Blok
d
Protonlar
Elektronlar
Neytronlar
105
105
157
Umumiy xususiyatlar
Atom raqami
105
Atom massasi
[268]
Mass raqami
262
Turkum
Oʻtish metallar
Ranggi
Nomaʼlum
Radioaktivlik
Ha
Named after the Russian town of Dubna
Kristall tuzilma
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.
Qobiqdagi elektronlar soni
2, 8, 18, 32, 32, 11, 2
Elektron konfiguratsiyasi
[Rn] 5f14 6d3 7s2
The Berkeley team proposed the name hahnium for the element
Jismoniy xususiyatlar
Faza
Qattiq modda
Zichlik
39 g/cm3
Erish harorati
-
Qaynash harorati
-
Eritish issiqligi
Nomaʼlum kJ/mol
Bugʻlanish issiqligi
Nomaʼlum kJ/mol
Solishtirma issiqlik sigʻimi
- J/g·K
Yer po‘stidagi miqdori
Nomaʼlum
Olamdagi miqdori
Nomaʼlum
Rasm manbalari: Wikimedia Commons (Hrustov)
The element is named after after the Russian town of Dubna, the location of the Joint Institute for Nuclear Research
CAS raqami
53850-35-4
PubChem CID raqami
Nomaʼlum
Atom xususiyatlari
Atom radiusi
-
Kovalentlik radiusi
149 pm
Elektrmanfiylik
-
Ionlashish potensiali
-
Molyar hajm
-
Issiqlik oʻtkazuvchanlik
0,58 W/cm·K
Oksidlanish darajasi
5
Qo‘llanilish sohalari
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