The basic premise of the collision theory is that particles must first if a reaction is to occur. Additionally, that must be effective. To be effective, the particles must with the and the proper amount of

Collide, Collision,  Collide, Proper Orientation and Energy

Explanation:

The basic premise of the collision theory is that particles must first collide if a reaction is to occur. Additionally, that collision  must be effective. To be effective, the particles must collide  with the proper orientation and the proper amount of energy.

A collision must occur before there i any reaction.

201cm/s÷5: 18

explanation:

there is no explanation