Question

what is oxidation no. write the rule to determine the oxidation number of atom of and element in its compound

Answer 1

oxidation number is defined

Answer 2

The convention is that the cation is written first in a formula, followed by the anion. ...

The oxidation number of a free element is always 0. ...

The oxidation number of a monatomic ion equals the charge of the ion. ...

The usual oxidation number of hydrogen is +1. ...

The oxidation number of oxygen in compounds is usually -2.