Quick self-quiz

Tap each word to check what it stands for.

When to use it

Use it as an alternative to OIL RIG when writing half-reactions, to pair the electron direction with the correct process name.

Example

Writing the half-reaction for iron rusting, Fe loses electrons (LEO, oxidation): Fe→Fe2++2e−\text{Fe} \to \text{Fe}^{2+} + 2e^-.

Common mistake

Mixing up LEO and GER by reversing the order. LEO comes first because oxidation is written first in most standard half-reaction notation.