Talk:Vanadium
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Article changed over to new Wikipedia:WikiProject Elements format by Dwmyers 15:20 Feb 26, 2003 (UTC) and Maveric149. Elementbox converted 14:30, 2 July 2005 by Femto (previous revision was that of 20:16, 5 June 2005).
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[edit] Information Sources
Some of the text in this entry was rewritten from Los Alamos National Laboratory - Vanadium. Additional text was taken directly from USGS Vanadium Statistics and Information, from the Elements database 20001107 (via dict.org), Webster's Revised Unabridged Dictionary (1913) (via dict.org) and WordNet (r) 1.7 (via dict.org). Data for the table was obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but was reformatted and converted into SI units.
[edit] Talk
[edit] Hardness
How can an element with Mohs hardness of 7.0 be described as 'soft'? (Puna)
- Good question. The "soft" (but not the Mohs hardness) is found in the CRC Handbook, and all over the Web. The only reference for the Mohs hardness is hardnesses of the elements (data page) (Samsonov as quoted by WebElements.com). So far I have found neither proof nor disproof on the Web which isn't based on WebElements or Wikipedia itself. Anyone with a Gmelin? Femto 12:39, 1 November 2005 (UTC)
Otavan Suuri Snsyklopedia (an encyclopaedia) dercribes vanadium as hard and easily malleable, but it doesn't mention its Mohs hardness. (Puna)
[edit] Color
Why is Vandium described as a "bright white metal" in the article, while the sidebar states that it is "silvery gray metallic"? (67.162.95.21)
- "Pure vanadium is a greyish silvery metal, and is soft and ductile" - WebElements. "Pure vanadium is a bright white metal, and is soft and ductile" - CRC Handbook. "Gray white metal" - CRC Handbook in another place. "A gray or white malleable ductile polyvalent metallic element" - Merriam-Webster. "A bright white, soft, ductile metallic element" - American Heritage Dictionary. "a grayish malleable ductile polyvalent metallic element" - Merriam-Webster's Medical Dictionary. "Reduced as an infusible, grayish-white metallic powder" - 1913 Webster.
- You choose. I edited it to a consistent "gray-white metal" in both instances. Femto 21:57, 12 November 2005 (UTC)
[edit] Properties disagreement
I checked the entry in the Merck Index (12th edition, ISBN 0911910-12-3 ) on Vanadium and it disagrees on several points with the text box on the article..
Merck gives melting point of 1917C , density of 6.11 gcm-3 at 18.7C, electrical resistivity of 248nΩ.m and a half-life for 50V of 6E15 year ( the referenced website gives a third halflife of 3.9E17 years ).
Anyone have definative answers on this? Normally I'd trust Merck as it's THE reference for chemists, but typos or errors in it can't be absolutly ruled out. Astaroth5 21:07, 12 November 2005 (UTC)
- Most of the infobox properties are referenced by chemical elements data references. There's always some spread. Unless they're critical assesments of multiple sources themselves, you can consult two books and literally get three different values. Femto 21:57, 12 November 2005 (UTC)
[edit] Calculations
Does anyone know how to calculate how many protons, neutrons, and electrons are in a Vanadium 2+ ion with a molar mass of 53 grams per mole? If so please post on the comments page the instructions for the calculations. Thanks.
Well, it's fairly simple. The number of protons and neutrons is unaffected by the ion state. The protons in a single ion of Va2+ is equal to the atomic number. To know the number of neutrons you need to know the isotope of Va the ion represents; it is then the atomic weight minus the atomic number. The number of electrons in an electrically neutral atom is equal to the number of protons. To get a given positive charge, you subtract the charge from the number of electrons in the electrically neutral atom.
[edit] trivia
until disambig it would seem better to leave this stuff in - it could even develop into a separate subsection in the history. as an encylopedia it's better to be encyclopedic than not Mccready 14:41, 14 April 2006 (UTC)
- >> There is a street in Pittsburgh, Pennsylvania named Vanadium Road. The US states of Colorado and New Mexico both have towns named Vanadium.
- I contest that the addition of subjects which are unrelated other than by name is encyclopedic. There should be separate articles. If there is any historical significance of the road to this element, the fact that it exists can be preserved on this talk page, until further expansion (in the history section, not as trivia). Femto 16:00, 14 April 2006 (UTC)
Hi Femto, Seems we have a disagreement here. How should we resolve it? Mccready 08:09, 15 April 2006 (UTC)
- There's you and 165.190.89.149 who added this, and there's Edgar181 and me who removed it, so simply by counting score the support is plus minus zero, and the article should remain as it was before. I still maintain that "Wikipedia is not an indiscriminate collection of information", and that the mention of things merely named after the subject lacks notability. Even if it were a globally important mining area, the location itself should be mentioned in this context first, not its particular namings. Femto 14:04, 15 April 2006 (UTC)
[edit] isotopes
The "isotopes" section is not very clear. I don't want to mess with it too much because I'm not sure what it means. Could someone who knows what it is supposed to say improve its English? --Strait 22:21, 21 August 2006 (UTC)
[edit] compounds
What is the meaning of "(although V2O3)" in "used in the manufacture of Ferro-Vandaium (although V2O3) it can be used as a dye and color-fixer."? --Ben Best 13:50, 5 September 2006 (UTC)
[edit] Pentavalent VOSO4
Pentavalent VOSO4 has been reported to be more than 5 times as toxic as trivalent V2O3 (Roschin, 1967).
VOSO4 is a tetravalent vanadium compound. Is this an error for V2O5?--Syd Henderson 21:07, 8 October 2006 (UTC)
