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  2. Noble metal - Wikipedia

    en.wikipedia.org/wiki/Noble_metal

    The simplified entries in the reaction column can be read in detail from the Pourbaix diagrams of the considered element in water. Noble metals have large positive potentials; [22] elements not in this table have a negative standard potential or are not metals.

  3. Platinum group - Wikipedia

    en.wikipedia.org/wiki/Platinum_group

    The platinum-group metals (PGMs), also known as the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs), are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 ...

  4. Noble elements - Wikipedia

    en.wikipedia.org/wiki/Noble_elements

    Elements that are considered "noble" include: noble gases; noble metals This page was last edited on 21 February 2022, at 05:22 (UTC). Text is available under the ...

  5. Precious metal - Wikipedia

    en.wikipedia.org/wiki/Precious_metal

    Precious metals, particularly the noble metals, are more corrosion resistant and less chemically reactive than most elements. They are usually ductile and have a high lustre. Historically, precious metals were important as currency but they are now regarded mainly as investment and industrial raw materials.

  6. List of alternative nonmetal classes - Wikipedia

    en.wikipedia.org/wiki/List_of_alternative...

    After the relevant nonmetals are classified as either noble gases or halogens, the remainder are considered on a group-by-group basis. This results in six or seven sets of nonmetals, depending on the treatment of boron, which in some cases is regarded as a metalloid.

  7. Platinum - Wikipedia

    en.wikipedia.org/wiki/Platinum

    It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Consequently, platinum is often found chemically uncombined as native platinum. Because it occurs naturally in the alluvial sands of various rivers, it was first used by pre-Columbian South American natives to produce artifacts.

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  9. Post-transition metal - Wikipedia

    en.wikipedia.org/wiki/Post-transition_metal

    Practically, the group 11 metals (copper, silver and gold) are ordinarily regarded as transition metals (or sometimes as coinage metals, or noble metals) whereas the group 12 metals (zinc, cadmium, and mercury) may or may not be treated as B-subgroup metals depending on if the transition metals are taken to end at group 11 or group 12.