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Summary

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English: Periodic table extract showing approximately how often each element tends to be recognized as a noble metal:
Color guide
 7  most often (Ru, Rh, Pd, Os, Ir, Pt, Au)[1]
 1  often (Ag)[2]
 2  sometimes (Cu, Hg)[3]
 6  in a limited sense (Tc, Re, As, Sb, Bi, Po)

The thick black line encloses the seven to eight metals most often to often so recognized. Silver is sometimes not recognized as a noble metal on account of its greater reactivity.[4]

Marker guide
* may be tarnished in moist air or corrode in an acidic solution containing oxygen and an oxidant
† attacked by sulfur or hydrogen sulfide
§ self-attacked by radiation-generated ozone
References
  1. ↑ "Noble Metals, Analytical Chemistry of" in (2021) Encyclopedia of Analytical Chemistry: Applications, Theory and Instrumentation, Wiley Online Library DOI: 10.1002/9780470027318.a2411.pub3.
  2. ↑ "Noble metals and noble metal alloys" in (2018) Springer Handbook of Materials Data, Cham: Springer DOI: 10.1007/978-3-319-69743-7_14.
  3. ↑ (2020). "Chemical causes of nobility". ChemPhysChem 21: 360–369. DOI:10.1002/cphc.202000013.
  4. ↑ Rayner-Canham, G (2018) "Organizing the transition metals" in Mendeleev to Oganesson: A multidisciplinary perspective on the periodic table, Oxford University, pp. 195–205 ISBN: 978-0-190-668532.
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Date/TimeThumbnailDimensionsUserComment
current23:54, 27 April 2022Thumbnail for version as of 23:54, 27 April 20222,290 × 1,236 (353 KB)SandbhReplace partly dashed line around Ag with diagonal solid line
07:03, 24 April 2022Thumbnail for version as of 07:03, 24 April 20222,290 × 1,244 (350 KB)SandbhReduce categories by one
03:55, 16 April 2022Thumbnail for version as of 03:55, 16 April 20222,290 × 1,238 (344 KB)SandbhChange shading so that Pt and Au are always counted as noble
07:40, 14 April 2022Thumbnail for version as of 07:40, 14 April 20222,294 × 1,238 (350 KB)SandbhRemove legend; add group 6
06:54, 14 April 2022Thumbnail for version as of 06:54, 14 April 20222,126 × 1,594 (408 KB)SandbhCorrected spelling of oganesson
07:48, 12 April 2022Thumbnail for version as of 07:48, 12 April 20221,688 × 1,276 (319 KB)SandbhUploaded own work with UploadWizard

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