Dubnium (Db)

General Properties

Symbol Db
Atomic Number 105
Atomic Weight (268)
Group
5 (vanadium family)
VA (IUPAC), VB (CAS)
Transition Metal, Metal, Radioactive, Synthetic
Period 7
Block d

Physical Properties

Density --
Atomic Volume cm3/mole
Atomic Radius --
Covalent Radius --
Crust Abundance None
Crystal Structure Unknown

Energy

Electronegativity (Pauling Scale)
Electron Affinity --
1st Ionization Energy --
Specific Heat Capacity J g−1 K−1
Thermal Conductivity W·m−1·K−1

Electrons & Oxidation

Oxidation States
Electrons Per Shell 2 8 18 32 32 11 2
Electron Configuration [Rn] 5f14 6d3 7s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f14 6d3 7s2
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
6s
↿⇂
6p
↿⇂
↿⇂
↿⇂
6d
↿ 
↿ 
↿ 
 
 
6f
 
 
 
 
 
 
 
7s
↿⇂
7p
 
 
 
7d
 
 
 
 
 
7f
 
 
 
 
 
 
 

Nuclear

Radioactive Yes
Half Life 5.56 h
Lifetime 8.33h
Decay Alpha Emission

Media

Planetary Bohr Model of Dubnium (Db)
Description
Synthetic radioactive metal.
Uses
It has no significant commercial applications.
Sources
Made by bombarding californium-249 with a beam of nitrogen-15
Pronounciation (English)
HA-ni-em

Translations

Afrikaans Dubnium
Aragonese Dubnio
العربية دبنيوم
Armãneashte Dubniumu
asturianu Dubniu
azərbaycan dili Dubinium
български Дубний
বাংলা ডুবনিয়াম
brezhoneg Dubniom
bosanski Dubnij[um]
Byelorussian Дубній
Cebuano Dubnyo
čeština Dubnium
Chuvash Дубни
Cymraeg Dubni
dansk Dubnium
Deutsch Dubnium
Ελληνικά Ντούμπνιο
English Dubnium
esperanto Dubnio
español Dubnio
eesti Dubnium
euskara Dubnio
فارسی دابنیم
suomi Dubnium
føroyskt Dubnium
français Dubnium
furlan Dubni
West-Frysk Dubnium
Gaeilge Dúibniam
Gàidhlig Duibniam
galego Dubnio
ગુજરાતી ડૂબ્નિયમનો
Gaelg Hahnium
Hakka Chinese --
עברית דובניום
हिन्दी डब्नियम
hrvatski Dubnij
magyar Dubnium
հայերեն Դուբնիում
Indonesia Dubnium
íslenska Dubnín
italiano Dubnio
日本語 ドブニウム
ქართული დუბნიუმი
کٲشُر Dubn
қазақ тілі Нильсборий
한국어 더브늄
Kurdish Dubniyûm
Komi Дубний
kernewek Dubnyum
кыргызча Нильсборий
Latin Dubnium
Lëtzebuergesch Dubnium
Lombard Dübni
lingála Dubenu
lietuvių Dubnis
latviešu Dubnijs
Mari Дубний
Maori Dubnium
македонски Дубниум
മലയാളം ഡബ്നിയം
монгол Дубни
Мокшан Нилсбори
Bahasa Melayu Hahnium
Malti Dubnju
Nahuatl Dubnio
Nederlands Dubnium
norsk Dubnium
Occitan Dubni
ирон Нильсборий
polski Dubn
português Dúbnio
Runasimi Dubniyu
română Dubniu
русский Дубний, ²Нильсборий
slovenčina Dubnium
slovenščina Dubnij
Samoan Dubnimi
Samogitian Dobnis
shqip Dubnium
српски Дубнијум
Southern Sotho Dubniamo
svenska Dubnium
Kiswahili Dubni
தமிழ் டப்னியம்
Tajik Дубний
ไทย ดุบเนียม
Türkçe Dubniyum
українська Дубній
o‘zbek Dubniy
Tiếng Việt Dubni
Võro Dubnium
中文 金杜

History

Discovered In
1967
Discovered By
Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA.
Discovered At
USSR, United States
Word Origin
The origin of the name dubnium is the Joint Nuclear Institute at "Dubna", an institute heavily involved in the search for heavy elements