According to collision theory, what must reactant particles do before a reaction can happen?

1. Bonds in the reactants have to break before new bonds can form in the products. 2. That takes a collision, and only some collisions are successful. 3. A successful collision needs enough energy and the correct orientation at the moment of impact. 4. Collisions that are too gentle, or that come in at the wrong angle, simply bounce apart again. _Source: Siyavula Physical Sciences Grade 12 (Everything Science, CC BY 4.0), Rate and Extent of Reaction_