Question

how to find oxidation number

Answer 1

Heya mate,

Your solution is in the attachment.

#Kevin

Hope it helps you.

Answer 2

hay......these steps may be helpful for you. ..............1.The oxidation number of a free element is always 0.
2.The oxidation no. of a monatomic ion equals the charge of the ion.
3.The oxidation no. of H is +1, but it is -1 in when combined with less electronegative elements.
4.The oxidation no. of O in compounds  is usually -2, but it is -1 in peroxides.
5.The oxidation number of a Group 1 element in a compound is +1.
6.The oxidation number of a Group 2 element is +2 in a compound.
7.The oxidation number of a Group 17 element in a binary compound is -1.
8.The sum of the oxidation numbers of all of the atoms in a neutral compound is 0.
9.The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion......