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Archive 1 |
Text says:
I say: why is that an issue? I thought it was proven since early 20th century. Maybe the text intends towards the island of stability? Rursus 21:22, 30 November 2006 (UTC)
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
--Anon
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)
Article changed over to new Wikipedia:WikiProject Elements format by maveric149. Elementbox converted 10:23, 15 July 2005 by Femto (previous revision was that of 14:48, 12 July 2005). 12 July 2005
Some of the text in this entry was rewritten from Los Alamos National Laboratory - Dubnium.
Data for the table were obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but were reformatted and converted into SI units.
I've reverted the discoverer back to an old state "Russian scientists" and not "Liam Morland".
I think that means that it's overwhelmingly likely to be vandalism. If not, then apologies Liam! 131.111.21.21 ( talk) 19:35, 22 May 2009 (UTC)
I've removed from the infobox: |- ! style="text-align:right;" | 261Db | style="text-align:center;" | syn | style="text-align:right;" | 1.8 s [1] | α | style="text-align:right;" | 257Lr |- ! style="text-align:right;" | 260Db | style="text-align:center;" | syn | style="text-align:right;" | 1.5 s [1] | α | style="text-align:right;" | 256Lr |- ! style="text-align:right;" | 259Db | style="text-align:center;" | syn | style="text-align:right;" | 0.5 s [1] | α | style="text-align:right;" | 255Lr |- ! rowspan="2" style="text-align:right; vertical-align:middle;" | 258Db | rowspan="2" style="text-align:center; vertical-align:middle;" | syn | rowspan="2" style="text-align:right; vertical-align:middle;" | 4.4 s [1] | 67% α | style="text-align:right;" | 254Lr |- | 33% ε | style="text-align:right;" | 258Rf |- ! style="text-align:right;" | 257mDb | style="text-align:center;" | syn | style="text-align:right;" | 0.76 s [1] | α | style="text-align:right;" | 253Lr |- ! style="text-align:right;" | 257gDb | style="text-align:center;" | syn | style="text-align:right;" | 1.50 s [1] | α | style="text-align:right;" | 253Lr |- ! rowspan="2" style="text-align:right; vertical-align:middle;" | 256Db | rowspan="2" style="text-align:center; vertical-align:middle;" | syn | rowspan="2" style="text-align:right; vertical-align:middle;" | 1.6 s [1] | 70% α | style="text-align:right;" | 253Lr |- | 30% ε | style="text-align:right;" | 256Rf
Nergaal ( talk) 18:11, 25 March 2011 (UTC)
Hello,
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)
The sound can't be hardly heard with maximum volume. -- 2.245.181.136 ( talk) 20:30, 18 August 2015 (UTC)
Here's a recent paper from last year. (Also, I would've kept the old chem section around till its replacement was written. It was certainly unreferenced, but it was at least accurate.)
Also, "[e]lements 108–116 are expected to be partially very noble metals". (Though element 112 has also been predicted to be a semiconductor, and element 117 may be a semimetal.) Double sharp ( talk) 10:15, 12 October 2016 (UTC)
Please note that additions to WP articles must not violate WP:CPVIO, as the additions by User:R8R Gtrs appear to do. Kbrose ( talk) 14:12, 3 December 2016 (UTC)
2005: 115 -> 105 + 5 alphas, +5 state confirmed
same story in 2016; new techniques come into play
review of quesous studies of Rf and Db, 2016
-- R8R ( talk) 19:48, 28 December 2016 (UTC)
More links:
review on recent experiments on elements 104 through 106
more experiments with aqueous HF
-- R8R ( talk) 16:27, 10 January 2017 (UTC)
Dubnium 268 is listed on the isotope table but there is no mention of its production. —Preceding unsigned comment added by 71.229.45.155 ( talk • contribs)
![]() | This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
Archive 1 |
Text says:
I say: why is that an issue? I thought it was proven since early 20th century. Maybe the text intends towards the island of stability? Rursus 21:22, 30 November 2006 (UTC)
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
--Anon
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)
Article changed over to new Wikipedia:WikiProject Elements format by maveric149. Elementbox converted 10:23, 15 July 2005 by Femto (previous revision was that of 14:48, 12 July 2005). 12 July 2005
Some of the text in this entry was rewritten from Los Alamos National Laboratory - Dubnium.
Data for the table were obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but were reformatted and converted into SI units.
I've reverted the discoverer back to an old state "Russian scientists" and not "Liam Morland".
I think that means that it's overwhelmingly likely to be vandalism. If not, then apologies Liam! 131.111.21.21 ( talk) 19:35, 22 May 2009 (UTC)
I've removed from the infobox: |- ! style="text-align:right;" | 261Db | style="text-align:center;" | syn | style="text-align:right;" | 1.8 s [1] | α | style="text-align:right;" | 257Lr |- ! style="text-align:right;" | 260Db | style="text-align:center;" | syn | style="text-align:right;" | 1.5 s [1] | α | style="text-align:right;" | 256Lr |- ! style="text-align:right;" | 259Db | style="text-align:center;" | syn | style="text-align:right;" | 0.5 s [1] | α | style="text-align:right;" | 255Lr |- ! rowspan="2" style="text-align:right; vertical-align:middle;" | 258Db | rowspan="2" style="text-align:center; vertical-align:middle;" | syn | rowspan="2" style="text-align:right; vertical-align:middle;" | 4.4 s [1] | 67% α | style="text-align:right;" | 254Lr |- | 33% ε | style="text-align:right;" | 258Rf |- ! style="text-align:right;" | 257mDb | style="text-align:center;" | syn | style="text-align:right;" | 0.76 s [1] | α | style="text-align:right;" | 253Lr |- ! style="text-align:right;" | 257gDb | style="text-align:center;" | syn | style="text-align:right;" | 1.50 s [1] | α | style="text-align:right;" | 253Lr |- ! rowspan="2" style="text-align:right; vertical-align:middle;" | 256Db | rowspan="2" style="text-align:center; vertical-align:middle;" | syn | rowspan="2" style="text-align:right; vertical-align:middle;" | 1.6 s [1] | 70% α | style="text-align:right;" | 253Lr |- | 30% ε | style="text-align:right;" | 256Rf
Nergaal ( talk) 18:11, 25 March 2011 (UTC)
Hello,
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)
The sound can't be hardly heard with maximum volume. -- 2.245.181.136 ( talk) 20:30, 18 August 2015 (UTC)
Here's a recent paper from last year. (Also, I would've kept the old chem section around till its replacement was written. It was certainly unreferenced, but it was at least accurate.)
Also, "[e]lements 108–116 are expected to be partially very noble metals". (Though element 112 has also been predicted to be a semiconductor, and element 117 may be a semimetal.) Double sharp ( talk) 10:15, 12 October 2016 (UTC)
Please note that additions to WP articles must not violate WP:CPVIO, as the additions by User:R8R Gtrs appear to do. Kbrose ( talk) 14:12, 3 December 2016 (UTC)
2005: 115 -> 105 + 5 alphas, +5 state confirmed
same story in 2016; new techniques come into play
review of quesous studies of Rf and Db, 2016
-- R8R ( talk) 19:48, 28 December 2016 (UTC)
More links:
review on recent experiments on elements 104 through 106
more experiments with aqueous HF
-- R8R ( talk) 16:27, 10 January 2017 (UTC)
Dubnium 268 is listed on the isotope table but there is no mention of its production. —Preceding unsigned comment added by 71.229.45.155 ( talk • contribs)