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chem 2
oxidation state rules
| Question | Answer |
|---|---|
| The oxidation number of any uncombined element is | 0 |
| The oxidation number of a monotonic ion equals | the charge on the ion |
| The more electronegative element in a binary compound is assigned the number equal to | the charge it would have if it were an ion |
| The oxidation number of fluorine in a compound is always | -1 |
| Oxygen has an oxidation number of __ if not with fluorine or in a peroxide | -2 |
| Oxygen's oxidation number when in a compound with fluorine is | +1 or +2 |
| Ozygen's oxidaiton number when in a peroxide is | -1 |
| Hydrogen's oxidation state in most of its compounds is __ unless it is combined with a metal | +1 |
| Hydrogen's oxidation state when combined with a metal | -1 |
| In compounds, group 1 elements have oxidation numbers of | +1 |
| In compounds, group 2 elements have oxidation numbers of | +2 |
| Aluminium has an oxidation state of | +3 |
| The sum of the oxidation numbers of all atoms in a neutral compound is | 0 |
| The sum of the oxidation numbers of all atoms in a polyatomic ion equals | the charge of the ion |