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This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
I thought the noble metals were those in Groups 8-10, formerly Group VIIIA, and that Group 11, the coinage metals, were not included as noble metals. Dpvwia 13:03, 15 February 2007 (UTC)—The preceding unsigned comment was added by Dpvwia (talk • contribs) 13:02, 15 February 2007 (UTC).
I agree Dpvia, the article is simply wrong. Cu,Ag and Au are traditionally the coinage metals. Cu has never been seen as a noble metal. Ag,Au,Pt,Pd etc have. The fact that people have wasted millions on creating eight and half Rg atoms or so that were gone in a blink of an eye really does not change those facts. Maybe we should call Rg a negative coinage metal for the ridiculous cost per atom?
As I understand it, the color of copper and gold results from the electron configuration, namely the single free electron, absorbing certain light frequencies. Why doesn't this happen with silver? -- megA (talk) 18:12, 15 May 2012 (UTC)
IIRC for Ag the effect also happens, but the photons are not in the visible range. For Cu the distance between the ground state and first excited state is low and hence it appears reddish: by Ag they have moved far enough apart that the metal appears silvery. But after this relativistic effects kick in to stabilize the excited state, so that at Au the gap has narrowed enough that it appears golden yellow. It's expected that at Rg, the excited state would be so stabilized that it would actually become the ground state: the gap is then comparable to Ag's, so it would probably also appear silvery in bulk. Double sharp (talk) 13:38, 17 July 2014 (UTC)
There is a move discussion in progress on Talk:Group 3 element which affects this page. Please participate on that page and not in this talk page section. Thank you. —RMCD bot 21:15, 15 January 2013 (UTC)