The potential charge an atom would have if every one of its links to other atoms were fully ionic is known as the oxidation state, also known as the oxidation number. It describes how much an atom in a chemical molecule has been oxidized. The oxidation state can theoretically be positive, negative, or zero.
FeBr3
Br will remain in its normal oxidation state, which is -1, because it is more electronegative than Fe.
Let Fe's oxidation state now be "x."
x + (3*-1) = 0
=> x = +3
Answers: Fe : +3 & Br : -1
The total number of electrons that have been removed from an element (creating a positive oxidation state) or added to an element (creating a negative oxidation state) to get it to its current state is the oxidation state of an atom.
One of these oxidation laws states that a free, neutral element has an oxidation number of zero. A monoatomic ion's charge is the same as its oxidation number. For Group IA elements, the oxidation number is always 1. For Group IIA elements, the oxidation number is always +2.
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