TmCl3
Thulium chloride
Tm3+ balances chloride ions.
What Is the Charge of Thulium?
Thulium commonly forms Tm3+ in introductory ionic compounds.
Quick answer: Thulium usually has a common ionic charge of +3, written as Tm3+.
| Element | Thulium |
|---|---|
| Symbol | Tm |
| Atomic number | 69 |
| Common ionic charge | +3 |
| Common ions | Tm3+ |
Why Thulium has this charge
Thulium is an lanthanide. Its chemistry can be specialized, but +3 is the most useful introductory reference range.
This is a classroom reference range, not an exhaustive list of all oxidation states.
Thulium charge examples
Tm2O3
Thulium oxide
Thulium can form oxides where total positive and negative charge balances.
FAQ
Is Thulium 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.