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A metal (from
Ancient Greek ÎŒÎÏÎ±Î»Î»ÎżÎœ (mĂ©tallon) 'mine, quarry, metal') is a material that when polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against
1041:
Article says "In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero." - Is it "generally regarded" or just one persons idea ? It's a very theoretical definition rather than being something that can be tested or measured. If
966:
I removed sulfur nitride from the lede. It's considered a non-metal with some metallic properties. Its inclusion as a metal contradicts a) this article, b) the sulfur nitride article c) formal reference works on the topic. Its original inclusion in 2019 was unreffed.
1260:
Neither source has to make exactly that statement. What is included is a rephrasing which is covered in all solid state physics books. Unfortunately you believe that sources must be verbatim, this is wrong. If you want to challenge this I will post on
1097:"Plutonium increases its electrical conductivity when heated in the temperature range of around â175 to +125 °C, with anomalously large thermal expansion coefficient and a phase change from monoclinic to face-centered cubic near 100 °C."
1207:
Paul McEuen (Global edition, ed.). Hoboken, NJ: Wiley. ISBN 978-1-119-45416-8. Ashcroft, Neil W.; Mermin, N. David (1976). Solid state physics. New York: Holt, Rinehart and
Winston. ISBN 978-0-03-083993-1.
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Since the fact that Pu undergoes a phase change from simple monoclinic to body-centred monoclinic is not germane to the point about its unusual tempertaure coefficient of resistivity, I've removed it. ---
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is considered a metal, Since it conducts electricity moderately well and seems to have the general characteristics (of a metal) in the introduction. Or, Is it too soft to be a metal ? -
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https://www.rmcybernetics.com/science/diy-experiments/heat-and-resistivity#:~:text=The%20temperature%20affects%20the%20dimensions,flow%20than%20a%20thinner%20one
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Wiley-Interscience, New York, p. 466, say that when Pu (a metal) is heated within a temperature range of 100 to 400K its conductivity increases.
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true, it would make all materials, while superconducting, metals. A more usual definition of a metal might be having
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Pu increasing its electrical conductivity when heated in the temperature range of around â175 to +125 °C; nor
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Neither cite not cite say that nonmetallic materials do not have electrons available at the Fermi level.
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or many other introductions to physics. With anomalous expansion, as in Pu this will have a large effect.
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and mineral industries. If you would like to participate, you can edit the attached article, or visit the
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Nor did the article's citation give a page number/s specifying where the pertient facts were mentioned.
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on
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on
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on
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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The same source shows that the simple monoclinic phase of Pu is stable below 122 °C (p. 465).
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resource. If you would like to participate, you can choose to edit this article, or visit the
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i.e. no orginal research. Neither source explicitly makes the statements concerned. ---
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Disputed cite: Nonmetallic materials do not have electrons available at the Fermi level
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Please do more reading on fundamental physics, and careful analysis, see for instance
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Are there less controversial metal (or metallic) molecular compounds ? -
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Knowledge. Please participate by editing this article, or visit the
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I reverted this edit on June 20th and added supporting citations.
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I have therefore amended the mention of Pu to read...
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Plutonium and its alloys: from atoms to microstructure
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The source was given as Hecker, Siegfried S. (2000). "
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Knowledge level-3 vital articles in
Physical sciences
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an "anomalously large" thermal expansion coefficient.
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Reading the source, it does not say anything about:
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461:is part of
30:written in
1305:Categories
1263:WP:PHYSICS
748:discussion
459:Talk:Metal
359:and their
1105:" (PDF).
919:Archive 1
846:Materials
837:Materials
809:Materials
261:Chemistry
252:chemistry
224:Chemistry
88:is rated
1020:graphite
947:180 days
907:Archives
370:Elements
361:isotopes
313:Elements
45:traveled
1289:Ldm1954
1267:Ldm1954
1227:Ldm1954
1173:Ldm1954
878:on the
784:on the
736:project
683:on the
594:on the
505:on the
478:Geology
469:geology
422:Geology
397:on the
288:on the
199:on the
172:Physics
163:Physics
119:Physics
90:C-class
41:defense
1248:Sandbh
1244:WP:NOR
1211:Sandbh
1154:Sandbh
984:Sandbh
757:Mining
740:mining
708:Mining
96:scale.
1052:Rod57
1046:in a
1024:Rod57
1001:Rod57
750:, or
656:Craft
647:craft
619:Craft
77:This
37:color
1293:talk
1271:talk
1252:talk
1215:talk
1177:talk
1158:talk
1089:The
1075:talk
1056:talk
1050:? -
1028:talk
1005:talk
988:talk
973:talk
870:High
675:High
586:High
776:Top
497:Mid
389:Top
280:Top
191:Mid
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