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| 1. |
Explain oxidation numbers |
| Answer» An oxidation number is a number that is assigned to an atom in a substance. The oxidation number could be positive, negative, or zero, and it indicates if electrons are lost or gained.In other words, the oxidation number is a number that helps us keep track of electrons in an atom.Here, the oxidation number of calcium is +2 and the oxidation number of oxygen is -2.If the oxidation number is positive, then this means that the atom loses electrons, and if it is negative, it means the atom gains electrons. If it is zero, then the atom neither gains nor loses electrons. | |