Chemical reactions

4. A catalyst ____________ the activation energy needed for a chemical reaction to occur.
6. The new substance or substances that form after a chemical reaction has occurred
9. Before a chemical reaction can take place the particles in the reactants must collide with each other. This is called the __________ theory.
10. When chemical reactions take place, new chemical bonds are __________ in the products.
13. A substance that alters (speeds up or slows down) the rate of a chemical reaction.
14. Fast moving particles are said to have more ________ energy.
15. Another factor that can influence the rate of a chemical reaction.
17. This tells us how quickly a reaction occurs.
18. The rusting of a nail, the burning of a fuel and the boiling of an egg are all examples of a chemical ____________.
20. A reaction that gives out heat is said to be ___________.
21. These particles have a larger surface area
22. When bonds are broken energy is taken.

1. Increasing the surface ________ increases the rate of a chemical reaction.
2. The steeper the graph the of a chemical reaction the _________ it is occurring.
3. This is the minimum amount of energy that colliding particles must have if a reaction is to occur between them.
5. When new bonds are formed energy is given _____.
7. A factor that can influence the rate of a chemical reaction.
8. The chemicals that react together during a chemical reaction.
11. The greater the number of particles of solute in a solvent the more ___________ the solution.
12. A reaction that takes in heat in is said to be ___________.
16. An energy ___________ diagram shows the energy stored in the reactants compared to the energy stored in the products.
19. When chemical reactions take place, chemical bonds are __________ in the reactants.