### Analysis of the Options

1. **One less than the charge on the ion**: This option may confuse some, as it does not represent a general rule for oxidation states. For example, a doubly charged ion like $ \text{Ca}^{2+} $ would have an oxidation state of +2.

2. **Always negative**: This is incorrect as the oxidation state can be positive, negative, or zero, depending on the specific ion.

3. **Zero**: This option is not applicable to ions, as ions typically have a positive or negative charge.

4. **The same as the charge on the ion**: This is generally correct. The oxidation number of a simple ion is indeed equal to its charge. For example, $ \text{Na}^+ $ has an oxidation state of +1, and $ \text{Cl}^- $ has an oxidation state of -1.

### Final Answer
The correct option is **the same as the charge on the ion**.

Question

### Analysis of the Options

1. **One less than the charge on the ion**: This option may confuse some, as it does not represent a general rule for oxidation states. For example, a doubly charged ion like $ \text{Ca}^{2+} $ would have an oxidation state of +2.

2. **Always negative**: This is incorrect as the oxidation state can be positive, negative, or zero, depending on the specific ion.

3. **Zero**: This option is not applicable to ions, as ions typically have a positive or negative charge.

4. **The same as the charge on the ion**: This is generally correct. The oxidation number of a simple ion is indeed equal to its charge. For example, $ \text{Na}^+ $ has an oxidation state of +1, and $ \text{Cl}^- $ has an oxidation state of -1.

### Final Answer
The correct option is **the same as the charge on the ion**.

Knowee AI · Accepted Answer

### Analysis of the Options

1. **One less than the charge on the ion**: This option may confuse some, as it does not represent a general rule for oxidation states. For example, a doubly charged ion like $ \text{Ca}^{2+} $ would have an oxidation state of +2.

2. **Always negative**: This is incorrect as the oxidation state can be positive, negative, or zero, depending on the specific ion.

3. **Zero**: This option is not applicable to ions, as ions typically have a positive or negative charge.

4. **The same as the charge on the ion**: This is generally correct. The oxidation number of a simple ion is indeed equal to its charge. For example, $ \text{Na}^+ $ has an oxidation state of +1, and $ \text{Cl}^- $ has an oxidation state of -1.

### Final Answer
The correct option is **the same as the charge on the ion**.

For an ion, the oxidation number is __.Multiple choice question.one less than the charge on the ionalways negativezerothe same as the charge on the ion

Question

For an ion, the oxidation number is __.

Solution

Analysis of the Options

Final Answer

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