Дубниум

105
Db
Група
5
Периода
7
блок
d
Protons
Electrons
Neutrons
105
105
157
Општи Својства
Атомски број
105
Атомска тежина
[268]
Mass Number
262
Category
Преоден метал
Color
Нема одговор
Radioactive
Да
Named after the Russian town of Dubna
Кристална структура
Нема одговор
History
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.
Electrons per shell
2, 8, 18, 32, 32, 11, 2
Електронска конфигурација
[Rn] 5f14 6d3 7s2
Db
The Berkeley team proposed the name hahnium for the element
Физички Својства
Фаза
Solid
Густина
39 g/cm3
Точка на топење
-
Точка на вриење
-
Топлина на топење
Нема одговор
Топлина на испарување
Нема одговор
Specific Heat Capacity
-
Abundance in Earth's crust
Нема одговор
Abundance in Universe
Нема одговор
The
Кредити на слика: 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
Нема одговор
Атомски Својства
Атомски полупречник
-
Ковалентен полупречник
149 pm
Електронегативност
-
Ionization Potential
-
Atomic Volume
-
Thermal Conductivity
0,58 W/cm·K
Oxidation States
5
Applications
Dubnium is used for scientific research purposes only.
Dubnium is harmful due to its radioactivity
Isotopes
Stable Isotopes
-
Unstable Isotopes
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db