Question

Which of the following elements had same oxidation number in all its compounds oxygen., carbon; potassium , sulphur or nitrogrn

Answer 1

Dear Student,
Potassium has an oxidation state of +1 , which is present in all the compounds . Because potassium is an alkali metal and loses one electron to achieve a stable octet. It does not have a variable state because it does not have vacant d-orbital therefore it cannot expand its configuration or lose more than one electron therefore the state is fixed while all other elements given have variable state such as in CO₂ , C has +4state while in CO , C has +2 atate,
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