Question

the oxidation state of an element it combined state is​

Answer 1

Answer: The oxidation element of a pure element is always 0.

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Answer 2

Answer:

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The sum of the oxidation states of all the atoms or ions in a neutral compound is zero. The sum of the oxidation states of all the atoms in an ion is equal to the charge on the ion. The more electronegative element in a substance is assigned a negative oxidation state.