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| 1. |
How to find oxidation number |
| Answer» \tThe oxidation number of a free element is always 0.\tThe oxidation number of a monatomic ion equals the charge of the ion.\tThe oxidation number of\xa0H\xa0is +1, but it is -1 in when combined with less electronegative elements.\tThe oxidation number of\xa0O\xa0in\xa0compounds\xa0is usually -2, but it is -1 in peroxides.\tThe oxidation number of a Group 1 element in a compound is +1.\tThe oxidation number of a Group 2 element in a compound is +2.\tThe oxidation number of a Group 17 element in a binary compound is -1.\tThe sum of the oxidation numbers of all of the atoms in a neutral compound is 0.\tThe sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion. | |