The mineralogy of Dubnium
| General Properties | |
|---|---|
| Symbol: | Db |
| Atomic Number: | 105 |
| Standard atomic weight (Ar): | [268] |
| Electron configuration: | [Rn].5f14.6d3.7s2 |
| Atomic Properties |
|---|
| Physical Properties | |
|---|---|
| Metal/Non-Metal: | transition metal |
| Main isotopes of Dubnium | ||||
|---|---|---|---|---|
| Isotope | % in Nature | Half Life | Decay type | Decay product |
| 262Db | synthetic | 34s | α | 258Lr |
| Spontaneous fission | ||||
| 263Db | synthetic | 27s | Spontaneous fission | |
| α | 259Lr | |||
| ε | 263mRf | |||
| 266Db | synthetic | 22min | Spontaneous fission | |
| ε | 266Rf | |||
| 267Db | synthetic | 1.2h | Spontaneous fission | |
| 268Db | synthetic | 29h | Spontaneous fission | |
| ε | 268Rf | |||
| 270Db | synthetic | 23.15h | Spontaneous fission | |
| Other Information | |
|---|---|
| Year Discovered: | 1968 |
| Discovered By: | Joint Institute for Nuclear Research |
| Named For: | town of Dubna in Russia |
| CPK color coding: | #D1004F |
| External Links: | WikipediaWebElementsLos Alamos National LaboratoryTheodore Gray's PeriodicTable.com |
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| Rutherfordium << Dubnium >> Seaborgium | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spotted a mistake/omission? - These pages are a work in progress, so please send all comments/corrections to jolyon@mindat.org. Thank you.
Constants and physical property data from:
David R. Lide (ed.), CRC Handbook of Chemistry and Physics, 85th Edition. CRC Press. Boca Raton, Florida (2005).
Kaye and Laby Tables of Physical & Chemical Constants (2005). Section 3.1.3, Abundances of the elements
A. Earnshaw, N. Greenwood, Chemistry of the Elements, 2nd edition, Butterworth-Heinemann, (1997)
Thomas J. Ahrens (ed.), Global Earth Physics : A Handbook of Physical Constants, American Geophysical Union (1995)
L.B. Railsback, An Earth Scientist's Periodic Table of the Elements and Their Ions : Geology 31:9 p737-740 (2003)
Emsley, J. Nature's Building Blocks: An A-Z Guide to the Elements. New York: Oxford University Press (2001)
