Monatomic ions consist of a single atom that has gained or lost electrons, making them electrically charged. Here are some examples of monatomic ions and their typical oxidation numbers:

Cations (Positively Charged Ions):

1. Sodium (Na+): Oxidation number = +1

2. Potassium (K+): Oxidation number = +1

3. Calcium (Ca2+): Oxidation number = +2

4. Aluminum (Al3+): Oxidation number = +3

5. Iron (Fe2+ or Fe3+): Oxidation numbers = +2 or +3

6. Copper (Cu+ or Cu2+): Oxidation numbers = +1 or +2

7. Zinc (Zn2+): Oxidation number = +2

8. Hydrogen (H+): Oxidation number = +1

Anions (Negatively Charged Ions):

1. Fluoride (F-): Oxidation number = -1

2. Chloride (Cl-): Oxidation number = -1

3. Bromide (Br-): Oxidation number = -1

4. Iodide (I-): Oxidation number = -1

5. Oxide (O2-): Oxidation number = -2

6. Sulfide (S2-): Oxidation number = -2

7. Nitride (N3-): Oxidation number = -3

8. Phosphide (P3-): Oxidation number = -3

Please note that these oxidation numbers are the most common ones for these ions, but in some compounds, they may have different oxidation states.