Dubnium

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Dubnium Quick Reference

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Notes

Symbol

Db

Atomic Number

105

Oxidation States

5

predicted

4

predicted

Electron Configuration

Orbital Occupancy

[Rn] 5f14 6d3 7s2

[Rn] represents the closed-shell electron configuration of radon

Orbital Filling Order

[Rn] 7s2 5f14 6d3

[Rn] represents the closed-shell electron configuration of radon

Term Symbol

4F3/2

see expanded configuration ...

Ionization Energies

I (1)

6.6 eV

Thermal Conductivity

300 K

58 W/(m K)

derived value

Pyykkö Covalent Radius

single bond

149 pm

double bond

136 pm

triple bond

126 pm

Quantity

Dubnium Atomic Structure

Notes

Ionization Energies

I (1)

6.6 eV

Electron Configuration

Orbital Occupancy

[Rn] 5f14 6d3 7s2

[Rn] represents the closed-shell electron configuration of radon

Orbital Filling Order

[Rn] 7s2 5f14 6d3

[Rn] represents the closed-shell electron configuration of radon

Term Symbol

4F3/2

see expanded configuration ...

Fluorescence Yields

ωK

0.973

ωL1

0.300

ωL2

0.553

ωL3

0.618

Coster-Kronig Yields

F12

0.01 

F13

0.51 

F23

0.178

Quantity

Dubnium Atomic Interaction

Notes

Oxidation States

5

predicted

4

predicted

Quantity

Dubnium Thermodynamics

Notes

Thermal Conductivity

300 K

58 W/(m K)

derived value

Quantity

Dubnium Identification

Notes

CAS Number

53850-35-4

Quantity

Dubnium Atomic Size

Notes

Pyykkö Covalent Radius

single bond

149 pm

double bond

136 pm

triple bond

126 pm

Quantity

Dubnium History

Notes

Discovery

date of discovery

1970

discoverer

Albert Ghiorso

birth

July 15, 1915

discoverer

Matti Nurmia

discoverer

Kari Eskola

discoverer

James Harris

discoverer

Pirkko Eskola

location of discovery

Berkeley, California

Origin of Element Name

origin

Dubna

origin description

place—Russian city that is the home of the Joint Institute for Nuclear Research (JINR)

Origin of Element Symbol

symbol: Db

origin

dubnium

origin description

element name

Formerly Used or Proposed Element Names and Symbols

name

joliotium

matching symbol

Jl

name

hahnium

matching symbol

Ha

name

nielsbohrium

matching symbol

Ns

name

bohrium

no matching symbol specified

name

unnilpentium

matching symbol

Unp

name

eka-tantalum

no matching symbol specified

Quantity

Dubnium Nomenclature

Notes

Element Names in Other Languages

French

dubnium

German

Dubnium

Italian

dubnio

Spanish

dubnio

Portuguese

dúbnio

Anions or Anionic Substituent Groups

dubnide

Cations or Cationic Substituent Groups

dubnium

Ligands

dubnido

Heteroatomic Anion

dubnate

'a' Term—Substitutive Nomenclature

dubna

'y' Term—Chains and Rings Nomenclature

dubny

References    (Click the button next to a value above to see complete citation information for that entry)

Connelly, Neil G., Ture Damhus, Richard M. Hartshorn, and Alan T. Hutton. Nomenclature of Inorganic Chemistry: IUPAC Recommendations 2005. Cambridge: RSC Publishing, 2005.

de Podesta, Michael. Understanding the Properties of Matter, 2nd edition. London: Taylor & Francis, 2002.

Emsley, John. Nature's Building Blocks: An A-Z Guide to the Elements. Oxford: Oxford University Press, 2003.

Emsley, John. The Elements, 3rd edition. Oxford: Oxford University Press, 1998.

Firestone, Richard B. Table of Isotopes, 8th edition, volume 2. Edited by Virginia S. Shirley, with assistant editors Coral M. Baglin, S. Y. Frank Chu, and Jean Zipkin. New York: John Wiley & Sons, Inc., 1996.

Ghiorso, A., B. G. Harvey, G. R. Choppin, S. G. Thompson, and G. T. Seaborg. "New Element Mendelevium, Atomic Number 101." Physical Review, volume 98, number 5, 1955, pp. 1518–1519. doi:10.1103/PhysRev.98.1518

Ghiorso, A., J. M. Nitschke, J. R. Alonso, C. T. Alonso, M. Nurmia, G. T. Seaborg, E. K. Hulet, and R. W. Lougheed. "Element 106." Physical Review Letters, volume 33, number 25, 1974, pp. 1490–1493. doi:10.1103/PhysRevLett.33.1490

Ghiorso, A., M. Nurmia, J. Harris, K. Eskola, and P. Eskola. "Positive Identification of Two Alpha-Particle-Emitting Isotopes of Element 104." Physical Review Letters, volume 22, number 24, 1969, pp. 1317–1320. doi:10.1103/PhysRevLett.22.1317

Ghiorso, A., S. G. Thompson, G. H. Higgins, G. T. Seaborg, M. H. Studier, P. R. Fields, S. M. Fried, H. Diamond, J. F. Mech, G. L. Pyle, J. R. Huizenga, A. Hirsch, W. M. Manning, C. I. Browne, H. L. Smith, and R. W. Spence. "New Elements Einsteinium and Fermium, Atomic Numbers 99 and 100." Physical Review, volume 99, number 3, 1955, pp. 1048–1049. doi:10.1103/PhysRev.99.1048

Ghiorso, A., T. Sikkeland, J. R. Walton, and G. T. Seaborg. "Element No. 102." Physical Review Letters, volume 1, number 1, 1958, pp. 18–21. doi:10.1103/PhysRevLett.1.18

Ghiorso, Albert, Matti Nurmia, Kari Eskola, James Harris, and Pirkko Eskola. "New Element Hahnium, Atomic Number 105." Physical Review Letters, volume 24, number 26, 1970, pp. 1498–1503. doi:10.1103/PhysRevLett.24.1498

Ghiorso, Albert, Matti Nurmia, Kari Eskola, James Harris, and Pirkko Eskola. "New Element Hahnium, Atomic Number 105." Physical Review Letters, volume 24, number 26, 1970, pp. 1498–1503. doi:10.1103/PhysRevLett.24.1498

Ghiorso, Albert, Torbjørn Sikkeland, Almon E. Larsh, and Robert M. Latimer. "New Element, Lawrencium, Atomic Number 103." Physical Review Letters, volume 6, number 9, 1961, pp. 473–475. doi:10.1103/PhysRevLett.6.473

Ho, C. Y., R. W. Powell, and P. E. Liley. "Thermal Conductivity of the Elements: A Comprehensive Review." Journal of Physical and Chemical Reference Data, volume 3, supplement 1, 1974, pp. I–1 to I–796.

Hoffman, Darleane C., Albert Ghiorso, and Glenn T. Seaborg. The Transuranium People: The Inside Story. London, England: Imperial College Press, 2000.

Ihde, Aaron J. The Development of Modern Chemistry. New York: Dover Publications, Inc., 1984.

Indelicato, P., J. P. Santos, S. Boucard, and J.-P. Desclaux. "QED and Relativistic Corrections in Superheavy Elements." The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics, volume 45, number 1, 2007, pp. 155–170. doi:10.1140/epjd/e2007-00229-y

Keller, Jr., O. Lewin, and Glenn T. Seaborg. "Chemistry of the Transactinide Elements." pp. 139–166 in Annual Review Of Nuclear Science. Edited by Emilio Segre. Palo Alto, California: Annual Reviews Inc., 1977.

Krause, M. O. "Atomic Radiative and Radiationless Yields for K and L Shells." Journal of Physical and Chemical Reference Data, volume 8, number 2, 1979, pp. 307–327.

Marshall, James L. Discovery of the Elements: A Search for the Fundamental Principles of the Universe, 2nd edition. Boston, MA: Pearson Custom Publishing, 2002.

Miessler, Gary L., and Donald A. Tarr. Inorganic Chemistry, 3rd edition. Upper Saddle River, NJ: Pearson Prentice Hall, 2004.

Pekka Pyykkö. Self-Consistent, Year-2009 Covalent Radii. http://www.chem.helsinki.fi/~pyykko/Radii09.pdf. Accessed on November 20, 2010.

Pyykkö, Pekka, and Michiko Atsumi. "Molecular Double-Bond Covalent Radii for Elements Li-E112." Chemistry - A European Journal, volume 15, number 46, 2009, pp. 12770–12779. doi:10.1002/chem.200901472

Pyykkö, Pekka, and Michiko Atsumi. "Molecular Single-Bond Covalent Radii for Elements 1-118." Chemistry - A European Journal, volume 15, number 1, 2009, pp. 186–197. doi:10.1002/chem.200800987

Pyykkö, Pekka, Sebastian Riedel, and Michael Patzschke. "Triple-Bond Covalent Radii." Chemistry - A European Journal, volume 11, number 12, 2005, pp. 3511–3520. doi:10.1002/chem.200401299

Seaborg, Glenn T., and Walter D. Loveland. The Elements Beyond Uranium. New York: John Wiley & Sons, Inc., 1990.

Thompson, S. G., A. Ghiorso, and G. T. Seaborg. "The New Element Berkelium (Atomic Number 97)." Physical Review, volume 80, number 5, 1950, pp. 781–789. doi:10.1103/PhysRev.80.781

Thompson, S. G., K. Street, Jr., A. Ghiorso, and G. T. Seaborg. "The New Element Californium (Atomic Number 98)." Physical Review, volume 80, number 5, 1950, pp. 790–796. doi:10.1103/PhysRev.80.790

Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Houston, TX: Gulf Publishing Company, 2005.