Question

multiple choice 2 points
______ is the minimum kinetic energy reacting molecules must possess to overcome the repulsions between their electron - clouds when they collide.
activation energy
enthalpic energy
endothermic energy
termination energy

Explanation:

Activation energy is the minimum energy that reacting - molecules need to overcome electron - cloud repulsions during collisions for a reaction to occur. Exothermic and endothermic refer to heat changes in reactions, not this minimum collision energy. There is no such thing as "termination energy" in this context.

Answer:

activation energy