The article was promoted by User:SandyGeorgia 04:21, 31 December 2008 [1].
This article was pretty good (A-class but failed GA due to poor citing) before I started working on it a couple months ago. I've since expanded, cited, reorganized, trimmed and checked images as needed per FA standards. Article was previously brought to WikiProject Elements format by Bth (now inactive) in March 2004 and has since been expanded in true wiki-style by many people. I'm now pretty happy with the article and think it now meets all the FA criteria. If not, please tell me what else needs to be fixed and I'll fix it. I of course, support as nominator. mav ( talk) 15:09, 14 December 2008 (UTC) reply
Comments -
Comments
Support with comments:
Otherwise it looks really well for a FA. Nergaal ( talk) 21:21, 14 December 2008 (UTC) reply
The lead section is fine. I checked the layout of the remainder of the article. The number and quality of sections, images and references is commensurate with existing featured articles on chemical elements. Crystal whacker ( talk) 04:45, 15 December 2008 (UTC) reply
Support with comments:
The article is written in a way that is accessible to and informative for a layreader, such as myself. Though, obviously I don't have subject matter knowledge to judge if the article is comprehensive. -- Aude ( talk) 02:30, 17 December 2008 (UTC) reply
Comment Looks pretty good. Some attention to the authors in the references could be given tho. There still are some maintenace tags so those should be addressed. Some refs are in "Baker, Jim" fashion, others in "Jim Baker" and yet other in "J. Baker". Not a huge thing, but it's nice to have around, plus facilitates longterm maintenance. I'll read it in detail to give comments on content. Headbomb { ταλκ κοντριβς – WP Physics} 11:18, 19 December 2008 (UTC) reply
Image review: I'm checking for licensing information only. I am unable to comment on the accuracy of self-made images.
Oppose per (take deep breath):
Phew. That was long. I hope no one is put off by that list. Very few of these issues are deal breakers on their own, but taken collectively, does not lead me to think this deserved the FA star yet. Many of those are style issue that reflect personal preference, and I only mentioned them to have them considered by the collectivity. But there's of items on that list that do not require a lot of work to strike, and the article would be better off if someone did this work. I'll do some of them myself, but I'm not very knowledgeable about plutonium so someone else will have to work on this as well. Headbomb { ταλκ κοντριβς – WP Physics} 04:51, 21 December 2008 (UTC) reply
Support, as I think that the article is overall of FA quality—but here are some places where I think that the writing should be improved ;)
I think that the writing is overall pretty decent: let's fix up these little stumbles. :) {{ Nihiltres| talk| log}} 04:06, 23 December 2008 (UTC) reply
Something to fix:
I'm not sure what this intends to say, but it's not a complete sentence. Please rewrite for clarity. Crystal whacker ( talk) 22:39, 23 December 2008 (UTC) reply
From the lead section, paragraph 1: "When exposed to moist air, it expands up to 70% in volume and forms a powder that can spontaneously ignite." [Emphasis mine.] Is this really the elemental plutonium? Or is there a chemical reaction involved? From the "Flammability" section, it looks like this represents oxidation. Axl ¤ [Talk] 13:11, 26 December 2008 (UTC) reply
From "Characteristics", "Nuclear": "Plutonium is a radioactive actinide metal that, with uranium, is one of the few elements with one or more fissile isotopes." Why is uranium singled out as one of the few similar elements? Axl ¤ [Talk] 13:19, 26 December 2008 (UTC) reply
Why doesn't "Characteristics", "Nuclear" section describe the alpha decay of Pu-238? I added a brief comment right at the end of the section. From "Applications", "Power source", this property looks quite important. Axl ¤ [Talk] 14:03, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", paragraph 1: "Because of its comparatively large half-life, minute amounts of Pu-244 can be found in nature." I think I know what the author means, but the sentence appears counter-intuitive. Axl ¤ [Talk] 13:30, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", paragraph 1: "The primary decay modes before the most stable isotope, Pu-244, are spontaneous fission and α emission; the primary mode after is β emission. The primary decay products before Pu-244 are uranium and neptunium isotopes (neglecting the wide range of daughter nuclei created by fission processes), and the primary products after are americium isotopes." Does this mean that uranium and neptunium undergo spontaneous fission and alpha emission to form Pu-244? Pu-244 undergoes beta emission to form americium? This section could be clearer. Axl ¤ [Talk] 14:13, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", this equation does not appear to be correctly formatted:-
Axl ¤ [Talk] 14:20, 26 December 2008 (UTC) reply
From "History", "Production during the Manhattan Project", paragraph 4: "B, D and F were the initial reactors built at Hanford". I'm surprised that A, B and C weren't the initial reactors built. Axl ¤ [Talk] 15:00, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste": "The U.S. reactors at Hanford and the Savannah River Site in South Carolina produced 103,000 kg, and an estimated 170,000 kg of military-grade plutonium was produced in Russia. Each year about 20,000 kg of the element is still produced as a by-product of the nuclear power industry. As much as 1000 tonnes of plutonium may be in storage with more than 200 tonnes of that either inside or extracted from nuclear weapons." Why not use "tonnes" consistently throughout? Axl ¤ [Talk] 15:06, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste": "The glass consists of borosilicates mixed with as cadmium and gadolinium". The grammar is incorrect and I don't know what it should be. Axl ¤ [Talk] 21:59, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste", is there a reference for the Yucca Mountain nuclear waste repository? Axl ¤ [Talk] 22:02, 26 December 2008 (UTC) reply
The picture caption in "Applications", "Power source" reads "A pellet of plutonium-238, glowing due to blackbody radiation." However the article indicates that plutonium is silvery-white in colour. Is the pellet of Pu-238 really a black body? Axl ¤ [Talk] 22:22, 26 December 2008 (UTC) reply
From "Precautions", "Toxicity": "The U.S. Department of Energy estimates the increase in lifetime cancer risk for inhaled plutonium as 3 × 10−8 pCi−1.[48]" Unfortunately I can't seem to view the Argonne National Laboratory's fact sheet. Can someone confirm that the fact sheet is still available? Wouldn't "sieverts" be more helpful than "curies"? I would like to review the validity of the cancer risk information. Axl ¤ [Talk] 22:39, 26 December 2008 (UTC) reply
From "Precautions", "Criticality potential": "Plutonium in solution is more likely to form a critical mass than the solid form due to moderation by the hydrogen in water." [Emphasis mine.] Is "moderation" a technical term? Axl ¤ [Talk] 22:45, 26 December 2008 (UTC) reply
Relatively major referencing issue {{ inotes}} is not used like it should be. It doesn't produce anything the reader can see. This needs to be fixed (or worked around). Headbomb { ταλκ κοντριβς – WP Physics} 16:12, 26 December 2008 (UTC) reply
Support and comment by jimfbleak Because of its comparatively large half-life, minute amounts of Pu-244 can be found in nature. Is this true, given the age of the earth? Isn't it more likely that Pu-244 is formed from U-238, and its long half-life allows detectable amounts to build up? jimfbleak ( talk) 13:37, 30 December 2008 (UTC) reply
The article was promoted by User:SandyGeorgia 04:21, 31 December 2008 [1].
This article was pretty good (A-class but failed GA due to poor citing) before I started working on it a couple months ago. I've since expanded, cited, reorganized, trimmed and checked images as needed per FA standards. Article was previously brought to WikiProject Elements format by Bth (now inactive) in March 2004 and has since been expanded in true wiki-style by many people. I'm now pretty happy with the article and think it now meets all the FA criteria. If not, please tell me what else needs to be fixed and I'll fix it. I of course, support as nominator. mav ( talk) 15:09, 14 December 2008 (UTC) reply
Comments -
Comments
Support with comments:
Otherwise it looks really well for a FA. Nergaal ( talk) 21:21, 14 December 2008 (UTC) reply
The lead section is fine. I checked the layout of the remainder of the article. The number and quality of sections, images and references is commensurate with existing featured articles on chemical elements. Crystal whacker ( talk) 04:45, 15 December 2008 (UTC) reply
Support with comments:
The article is written in a way that is accessible to and informative for a layreader, such as myself. Though, obviously I don't have subject matter knowledge to judge if the article is comprehensive. -- Aude ( talk) 02:30, 17 December 2008 (UTC) reply
Comment Looks pretty good. Some attention to the authors in the references could be given tho. There still are some maintenace tags so those should be addressed. Some refs are in "Baker, Jim" fashion, others in "Jim Baker" and yet other in "J. Baker". Not a huge thing, but it's nice to have around, plus facilitates longterm maintenance. I'll read it in detail to give comments on content. Headbomb { ταλκ κοντριβς – WP Physics} 11:18, 19 December 2008 (UTC) reply
Image review: I'm checking for licensing information only. I am unable to comment on the accuracy of self-made images.
Oppose per (take deep breath):
Phew. That was long. I hope no one is put off by that list. Very few of these issues are deal breakers on their own, but taken collectively, does not lead me to think this deserved the FA star yet. Many of those are style issue that reflect personal preference, and I only mentioned them to have them considered by the collectivity. But there's of items on that list that do not require a lot of work to strike, and the article would be better off if someone did this work. I'll do some of them myself, but I'm not very knowledgeable about plutonium so someone else will have to work on this as well. Headbomb { ταλκ κοντριβς – WP Physics} 04:51, 21 December 2008 (UTC) reply
Support, as I think that the article is overall of FA quality—but here are some places where I think that the writing should be improved ;)
I think that the writing is overall pretty decent: let's fix up these little stumbles. :) {{ Nihiltres| talk| log}} 04:06, 23 December 2008 (UTC) reply
Something to fix:
I'm not sure what this intends to say, but it's not a complete sentence. Please rewrite for clarity. Crystal whacker ( talk) 22:39, 23 December 2008 (UTC) reply
From the lead section, paragraph 1: "When exposed to moist air, it expands up to 70% in volume and forms a powder that can spontaneously ignite." [Emphasis mine.] Is this really the elemental plutonium? Or is there a chemical reaction involved? From the "Flammability" section, it looks like this represents oxidation. Axl ¤ [Talk] 13:11, 26 December 2008 (UTC) reply
From "Characteristics", "Nuclear": "Plutonium is a radioactive actinide metal that, with uranium, is one of the few elements with one or more fissile isotopes." Why is uranium singled out as one of the few similar elements? Axl ¤ [Talk] 13:19, 26 December 2008 (UTC) reply
Why doesn't "Characteristics", "Nuclear" section describe the alpha decay of Pu-238? I added a brief comment right at the end of the section. From "Applications", "Power source", this property looks quite important. Axl ¤ [Talk] 14:03, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", paragraph 1: "Because of its comparatively large half-life, minute amounts of Pu-244 can be found in nature." I think I know what the author means, but the sentence appears counter-intuitive. Axl ¤ [Talk] 13:30, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", paragraph 1: "The primary decay modes before the most stable isotope, Pu-244, are spontaneous fission and α emission; the primary mode after is β emission. The primary decay products before Pu-244 are uranium and neptunium isotopes (neglecting the wide range of daughter nuclei created by fission processes), and the primary products after are americium isotopes." Does this mean that uranium and neptunium undergo spontaneous fission and alpha emission to form Pu-244? Pu-244 undergoes beta emission to form americium? This section could be clearer. Axl ¤ [Talk] 14:13, 26 December 2008 (UTC) reply
From "Characteristics", "Isotopes and synthesis", this equation does not appear to be correctly formatted:-
Axl ¤ [Talk] 14:20, 26 December 2008 (UTC) reply
From "History", "Production during the Manhattan Project", paragraph 4: "B, D and F were the initial reactors built at Hanford". I'm surprised that A, B and C weren't the initial reactors built. Axl ¤ [Talk] 15:00, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste": "The U.S. reactors at Hanford and the Savannah River Site in South Carolina produced 103,000 kg, and an estimated 170,000 kg of military-grade plutonium was produced in Russia. Each year about 20,000 kg of the element is still produced as a by-product of the nuclear power industry. As much as 1000 tonnes of plutonium may be in storage with more than 200 tonnes of that either inside or extracted from nuclear weapons." Why not use "tonnes" consistently throughout? Axl ¤ [Talk] 15:06, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste": "The glass consists of borosilicates mixed with as cadmium and gadolinium". The grammar is incorrect and I don't know what it should be. Axl ¤ [Talk] 21:59, 26 December 2008 (UTC) reply
From "History", "Cold War use and waste", is there a reference for the Yucca Mountain nuclear waste repository? Axl ¤ [Talk] 22:02, 26 December 2008 (UTC) reply
The picture caption in "Applications", "Power source" reads "A pellet of plutonium-238, glowing due to blackbody radiation." However the article indicates that plutonium is silvery-white in colour. Is the pellet of Pu-238 really a black body? Axl ¤ [Talk] 22:22, 26 December 2008 (UTC) reply
From "Precautions", "Toxicity": "The U.S. Department of Energy estimates the increase in lifetime cancer risk for inhaled plutonium as 3 × 10−8 pCi−1.[48]" Unfortunately I can't seem to view the Argonne National Laboratory's fact sheet. Can someone confirm that the fact sheet is still available? Wouldn't "sieverts" be more helpful than "curies"? I would like to review the validity of the cancer risk information. Axl ¤ [Talk] 22:39, 26 December 2008 (UTC) reply
From "Precautions", "Criticality potential": "Plutonium in solution is more likely to form a critical mass than the solid form due to moderation by the hydrogen in water." [Emphasis mine.] Is "moderation" a technical term? Axl ¤ [Talk] 22:45, 26 December 2008 (UTC) reply
Relatively major referencing issue {{ inotes}} is not used like it should be. It doesn't produce anything the reader can see. This needs to be fixed (or worked around). Headbomb { ταλκ κοντριβς – WP Physics} 16:12, 26 December 2008 (UTC) reply
Support and comment by jimfbleak Because of its comparatively large half-life, minute amounts of Pu-244 can be found in nature. Is this true, given the age of the earth? Isn't it more likely that Pu-244 is formed from U-238, and its long half-life allows detectable amounts to build up? jimfbleak ( talk) 13:37, 30 December 2008 (UTC) reply