CoCl2
Cobalt chloride
Co2+ balances chloride ions.
What Is the Charge of Cobalt?
Cobalt commonly forms Co2+ Co3+ in introductory ionic compounds.
Quick answer: Cobalt usually has a common ionic charge of +2 or +3, written as Co2+ or Co3+.
| Element | Cobalt |
|---|---|
| Symbol | Co |
| Atomic number | 27 |
| Common ionic charge | +2, +3 |
| Common ions | Co2+, Co3+ |
Why Cobalt has this charge
Cobalt is a transition metal. Transition metals can have multiple charges, so compound names and roman numerals matter.
This is a classroom reference range, not an exhaustive list of all oxidation states.
Cobalt charge examples
CoO
Cobalt oxide
Cobalt can form oxides where total positive and negative charge balances.
FAQ
Is Cobalt charge the same as oxidation state?
Ionic charge is the charge on an actual ion. Oxidation state is a bookkeeping number used inside compounds. They can match, but they are not always the same thing.
How do I use this in formulas?
Combine positive and negative ions so the total charge is zero. You can also use the ionic compound calculator.
Where can I see the full chart?
Use the periodic table with charges or the ionic charges chart.