Dubnium,  105Db
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକdubnium, Db
Appearanceunknown
ଉଚ୍ଚାରଣ/ˈdbniəm/
DOOB-nee-əm
Dubnium in the periodic table
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
Fluorine (halogen)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (other non-metal)
Sulfur (other non-metal)
Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (other non-metal)
Bromine (halogen)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (halogen)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanoid)
Cerium (lanthanoid)
Praseodymium (lanthanoid)
Neodymium (lanthanoid)
Promethium (lanthanoid)
Samarium (lanthanoid)
Europium (lanthanoid)
Gadolinium (lanthanoid)
Terbium (lanthanoid)
Dysprosium (lanthanoid)
Holmium (lanthanoid)
Erbium (lanthanoid)
Thulium (lanthanoid)
Ytterbium (lanthanoid)
Lutetium (lanthanoid)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (halogen)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
Thorium (actinoid)
Protactinium (actinoid)
Uranium (actinoid)
Neptunium (actinoid)
Plutonium (actinoid)
Americium (actinoid)
Curium (actinoid)
Berkelium (actinoid)
Californium (actinoid)
Einsteinium (actinoid)
Fermium (actinoid)
Mendelevium (actinoid)
Nobelium (actinoid)
Lawrencium (actinoid)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
Ta

Db

(Ups)
rutherfordiumdubniumseaborgium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)105
ଶ୍ରେଣୀ, ବ୍ଳକgroup 5, d-block
ପର୍ଯ୍ୟାୟperiod 7
ମୌଳିକ ପ୍ରକାର  transition metal
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)[268]
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ[Rn] 5f14 6d3 7s2
(predicted)[୧]
per shell
2, 8, 18, 32, 32, 11, 2
(predicted)
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥାsolid (predicted)
Density near r.t.29 (predicted)[୧] g/cm3
Atomic properties
Oxidation states5, 4, 3 (predicted)[୧] ​only bolded oxidation states are known experimentally
energies
(more)
Atomic radiusempirical: 139 (estimated)[୧] pm
Covalent radius149 (estimated)[୨] pm
Miscellanea
CAS Number53850-35-4
ଇତିହାସ
ଆବିଷ୍କାରJoint Institute for Nuclear Research (1968)
Most stable isotopes of dubnium
iso NA half-life DM DE (MeV) DP
262Db syn 34 s[୩][୪] 67% α 8.66,8.45 258Lr
33% SF
263Db syn 27 s[୪] 56% SF
41% α 8.36 259Lr
3% ε 263mRf
266Db syn 22 min[୪] SF
ε 266Rf
267Db syn 1.2 h[୪] SF
268Db syn 29 h[୪] SF
ε 268Rf
270Db syn 23.15 h[୫] SF
only isotopes with half-lives over 5 seconds are included here
| references

References

  1. ୧.୦ ୧.୧ ୧.୨ ୧.୩ Haire, Richard G. (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean (eds.). The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands: Springer Science+Business Media. ISBN 1-4020-3555-1.{{cite book}}: CS1 maint: ref duplicates default (link)
  2. Chemical Data. Dubnium - Db, Royal Chemical Society
  3. Münzenberg, G.; Gupta, M. (2011). "Production and Identification of Transactinide Elements": 877. doi:10.1007/978-1-4419-0720-2_19. {{cite journal}}: Cite journal requires |journal= (help)
  4. ୪.୦ ୪.୧ ୪.୨ ୪.୩ ୪.୪ Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010
  5. Oganessian, Yu. Ts.; Abdullin, F. Sh.; Bailey, P. D.; Benker, D. E.; Bennett, M. E.; Dmitriev, S. N.; Ezold, J. G.; Hamilton, J. H.; Henderson, R. A. (2010). "Synthesis of a New Element with Atomic Number Z=117". Physical Review Letters. 104. Bibcode:2010PhRvL.104n2502O. doi:10.1103/PhysRevLett.104.142502. PMID 20481935. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)