Magnetite is an iron ore made up only of the ions $\text{Fe}^{2+}$, $\text{Fe}^{3+}$ and $\text{O}^{2-}$. State the formula of magnetite.
- A$\text{Fe}_2\text{O}$
- B$\text{Fe}_2\text{O}_3$
- C$\text{Fe}_3\text{O}_2$
- D$\text{Fe}_3\text{O}_4$
Chemistry 0620 · IGCSE · Ions and ionic bonds