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Some of the text in this entry was rewritten from Los Alamos National Laboratory - Dubnium.
I've reverted the discoverer back to an old state "Russian scientists" and not "Liam Morland".
- There's no evidence, except for that derived from Wikipedia that it was discovered by Liam Morland
- It had no citation
- The edit was made by an IP which has only made four edits, each changing inappropriate things to say "Liam Morland".
- This relatively high stability compared to the surrounding elements on the periodic table gives evidence that by manipulating the number of neutrons in a nucleus, one can alter the stabilities of such nuclei.
Former contradiction (now fixed since anno dazumal)
The first sentence of the history section contains a contradiction:
"Dubnium ... was reportly first synthesized in early 1970 by Albert Ghiorso in Dubna..."
Ghiorso worked in Berkeley. I suspect that this sentence is a compromise between the two competing versions of the history of the discovery:
1) the element was discovered by Ghiorso in Berkeley
2) the element was discovered by Flyorov in Dubna
- Fixed. Thanks for the note. --mav
Is the estimated density really 39 g·cm—3? This is nearly twice that of other heavy elements... Yann 23:21, 1 June 2007 (UTC)
- Also, what's the source for this number? Both of the two sites linked at the bottom of the page either don't give a density, or say "no data". Unless there is a reliable source, this should be simply omitted. Kingdon 14:51, 4 June 2007 (UTC)
Production of Dubnium 268
Couldn't find anything about this 268Db having a halflife of 29h, except this link: Fig Branch, whose text happenstance is the same as that of this article. Halflife of 29h seems to be a grave error. I'll soon correct the text... 268Db has been extrapolated to a half life of 6h acc2 nutab03, but that is an extrapolation. I'm going to try to find 268Db from research published on the net. If that fails, the halflife is guessed to be 6h, nothing else. Said: Rursus ☻ 16:31, 1 June 2008 (UTC)
- Correcting myself: there are about 15 sources on Google claiming 268Db hl=29 h, all of them being copies of Wikipedia. Still searching. Said: Rursus ☻ 16:39, 1 June 2008 (UTC)
- This link is pretty trustable:
- It's a little oldish, from 2004, it says 16 hours. The half life might have been remeasured since then. I'm going on. Said: Rursus ☻ 16:45, 1 June 2008 (UTC)
I've removed from the infobox: |- | 261Db | syn | 1.8 s | α | 8.93 | 257Lr |- | 260Db | syn | 1.5 s | α | 9.13,9.08,9.05 | 256Lr |- | 259Db | syn | 0.5 s | α | 9.47 | 255Lr |- | rowspan="2" | 258Db | rowspan="2" | syn | rowspan="2" | 4.4 s | 67% α | 9.17,9.08,9.01 | 254Lr |- | 33% ε | | 258Rf |- | 257mDb | syn | 0.76 s | α | 9.16 | 253Lr |- | 257gDb | syn | 1.50 s | α | 9.07,8.97 | 253Lr |- | rowspan="2" | 256Db | rowspan="2" | syn | rowspan="2" | 1.6 s | 70% α | 9.12,9.08,9.01,8.89 | 253Lr |- | 30% ε | | 256Rf
- Cite error: The named reference
lifetimeswas invoked but never defined (see the help page).