Can an atom have have many oxidation numbers?
Answer:
Yes an element can have more than one oxidation state/number Example Iron Fe it has both 2+ and 3+ states even carbon exist in different oxidation states.This is mainly exhibhited by transition elements except Zinc
Please refer to the wikipedia link for further info
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Transition metals have more than one.
Chloride, hypochlorite, chlorite, chlorate, perchlorate.
Dioxygenyl hexafluoroplatinate, oxide, peroxide, superoxide.
Ammonia, hyponitrite, nitrite, nitrate.
Manganese sulfate, pyrolusite, potassium permanagnate.
Ferrous oxide, ferric oxide, magnetite, Collman's reagent (disodium iron tetracarbonylferrate).
Yes. For example, Iron (II) and Iron (III) are common, as are Copper (I) and Copper (II). This phenomenon is most often seen among the transition metals because d-orbitals and f-orbitals tend to have more than one energetically stable configuration.
Yep, especially the transition metals.
Their unfilled d and f shells allow the existence of variable oxidation states - giving rise to variable oxidation numbers.
E.g. Maganese, Iron, Cobalt all have variable oxidation states, giving rise to different coloured solutions and their large use as homogenous chemial catalysts
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