The correct format for a chemical reaction is:

Reactants → Products

* Reactants: The substances that go into a chemical reaction.

* Products: The substances that are formed from a chemical reaction.

* →: The arrow indicates the direction of the reaction.

Example:

2 H₂ + O₂ → 2 H₂O

* Reactants: Hydrogen (H₂) and Oxygen (O₂)

* Products: Water (H₂O)

Remember: It's essential to use the correct terminology for chemical reactions to communicate clearly about the changes that are happening.