Template:Infobox dubnium

Dubnium, ₁₀₅Db

Dubnium
Pronunciation	/ˈduːbniəm/ (DOOB-nee-əm) /ˈdʌbniəm/ (DUB-nee-əm)
Mass number	[268]
Dubnium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Ta ↑ Db ↓ — rutherfordium ← dubnium → seaborgium
Atomic number (Z)	105
Group	group 5
Period	period 7
Block	d-block
Electron configuration	[Rn] 5f14 6d3 7s2
Electrons per shell	2, 8, 18, 32, 32, 11, 2
Physical properties
Phase at STP	solid (predicted)
Density (near r.t.)	21.6 g/cm3 (predicted)
Atomic properties
Oxidation states	common: (none) (+3), (+4), (+5)
Ionization energies	1st: 665 kJ/mol 2nd: 1547 kJ/mol 3rd: 2378 kJ/mol (more) (all but first estimated)
Atomic radius	empirical: 139 pm (estimated)
Covalent radius	149 pm (estimated)
Other properties
Natural occurrence	synthetic
Crystal structure	​body-centered cubic (bcc) (predicted) Body-centered cubic crystal structure for dubnium
CAS Number	53850-35-4
History
Naming	after Dubna, Moscow Oblast, Russia, site of Joint Institute for Nuclear Research
Discovery	independently by the Lawrence Berkeley Laboratory and the Joint Institute for Nuclear Research (1970)
Isotopes of dubnium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 262Db synth 34 s α67% 258Lr SF33% – 263Db synth 27 s SF56% – α41% 259Lr ε3% 263mRf 266Db synth 11 min SF – ε 266Rf 267Db synth 1.4 h SF – 268Db synth 16 h SF – ε 268Rf α 264Lr 270Db synth 1 h α87% 266Lr SF13% –

Db · Dubnium
Rf ← ibox Rf	iso 105 Db  [] IB-Db [] IBisos []	→ Sg ibox Sg
File:Symbol category class.svg cat:Db (0) File:Symbol category class.svg cat:Db-isotopes (0) File:Commons-logo.svg Commons File:Wikidata-logo.svg Wikidata:Q1232 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-Db}
Main isotopes of dubnium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 262Db synth 34 s α67% 258Lr SF33% – 263Db synth 27 s SF56% – α41% 259Lr ε3% 263mRf 266Db synth 11 min SF – ε 266Rf 267Db synth 1.4 h SF – 268Db synth 16 h SF – ε 268Rf α 264Lr 270Db synth 1 h α87% 266Lr SF13% –

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)	caption: alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
File:Notification-icon-Wikidata-logo.svg Wikidata
Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (0) · (this table: )

References

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