Dubnium
105
Db
Groep
5
Periode
7
Blok
d
Protonen
Elektronen
Neutronen
105
105
157
Algemene Eigenschappen
Atoomnummer
105
Atomair gewicht
[268]
Massa Getal
262
Categorie
Overgangsmetalen
Kleur
n.v.t.
Radioactief
Ja
Named after the Russian town of Dubna
Kristalstructuur
n.v.t.
Historie
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.
Eletronen per schil
2, 8, 18, 32, 32, 11, 2
Electronconfiguratie
[Rn] 5f14 6d3 7s2
The Berkeley team proposed the name hahnium for the element
Fysieke Eigenschappen
Fase
Vast
Dichtheid
39 g/cm3
Smeltpunt
-
Kookpunt
-
Fusiewarmte
n.v.t.
Verdampingswarmte
n.v.t.
Specifieke Warmtecapaciteit
-
Overvloedig aanwezig in de aardkorst
n.v.t.
Overvloedig aanwezig in het universum
n.v.t.
Verdiensten voor afbeeldingen: Wikimedia Commons (Hrustov)
The element is named after after the Russian town of Dubna, the location of the Joint Institute for Nuclear Research
CAS-nummer
53850-35-4
PubChem CID nummer
n.v.t.
Atoomeigenschappen
Atoomstraal
-
Covalentiestraal
149 pm
Electronegativiteit
-
Ionisatiepotentiaal
-
Atoomvolume
-
Thermische geleiding
0,58 W/cm·K
Oxidatietoestanden
5
Toepassingen
Dubnium is used for scientific research purposes only.
Dubnium is harmful due to its radioactivity
Isotopen
Stabiele isotopen
-Instabiele isotopen
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db