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Why do the elements in the middle of the transition series show more number of common oxidation states than others?

andselisk
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Shub
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    Because they have more valence electrons to play with. Earlier elements have too few outside the core, and later ones tend to have their $d$ electrons sinking into said core. I will add that gold is known up to +5. – Oscar Lanzi Oct 14 '22 at 16:45
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    You say they show more number of oxidation states, and I say you got lame data. That's only most common ox. states. – Mithoron Oct 14 '22 at 16:53
  • Yep I wanted to mean common oxidation states. – Shub Oct 14 '22 at 17:00
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    Unfortunately what's common is opinion based ;> – Mithoron Oct 14 '22 at 18:36
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    related https://chemistry.stackexchange.com/questions/67510/why-do-heavier-transition-metals-show-higher-oxidation-states – Mithoron Oct 14 '22 at 18:54
  • https://chemistry.stackexchange.com/questions/61353/why-do-osmium-and-iridium-have-the-most-oxidation-states-of-all-the-elements – Nilay Ghosh Oct 15 '22 at 02:31

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