Question

What must happen before a chemical reaction can begin?

Answer 1

The reactants must come into contact? Bonds must be broken? Both? ^^

Answer 2

Go from there, I would definitely say the reactants must come into contact, although it sounds like an obvious answer it's a good one. (Y)

Answer 3

i agree with @KinzaN with first one is sretty much spot on

Answer 4

@Avii and @KinzaN yaw I agree