Across
- 1. The substances that result from a reaction
- 5. A reaction which releases energy is called ___________.
- 6. The amount of energy required for colliding molecules to break their bonds and react is called the _____________ energy.
- 7. A ________ replacement reaction is when a free element replaces one of the elements in a compound
- 9. When a complex substance breaks down into two or more simpler substances
- 12. If you increase the ______ area of a reactant by grinding it into a powder, it will react faster.
- 13. An expression that uses symbols and formulas to represent a chemical reaction
- 14. The substances that enter a reaction
- 16. The Law of ___________ of Mass states that the mass of the reactants is equal to the mass of products in a chemical reaction.
Down
- 2. The number in a chemical equation that describes how many molecules of a reactant there are
- 3. A reaction which absorbs energy is called _____________.
- 4. When two or more simple substances combine to for a complex substance.
- 8. A _________ replacement reaction is when two ionic compounds switch ions with each other.
- 10. This factor increases the rate of reaction by increasing the number of molecules in a given volume.
- 11. This factor increases the rate of reaction by increasing the kinetic energy of the colliding molecules.
- 15. A substance that speeds up the rate of reaction without getting involved in the reaction itself.
- 16. _____________ theory/model explains that for molecules to react they need to collide with the correct orientation and sufficient energy.
- 17. when substance combine to form new substances this is called a chemical ____________.