Chemistry / Unit 12 Chem 2378 short lesson, about 20 seconds
Heavier d-Block Series Favor Higher Oxidation States
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The idea
Second and third series elements are more stable in higher oxidation states than first-series counterparts, since larger atomic radii make removing outer electrons easier.
In practice
Molybdenum and tungsten, below chromium, are largely limited to 6+ in solution, while chromium favors the more stable 3+.
Where people slip
This within-group trend differs from Chem 2375's within-period trend — the two answer different questions, not to be conflated.
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