Chemical Reactions Vocabulary

4. Reactions in which one element replaces a similar element in a compound.
6. Reactions in which the ions of two compounds exchange places in an aqueous solution to form two new compounds.
10. A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound.
12. A chemical reaction in which heat is released to the surroundings.
14. Change substances into different substances by breaking and forming chemical bonds.
15. A small whole number that appears in front of a formula in a balanced chemical equation.
16. A substance that takes part in and undergoes change during a reaction.
18. A reaction in which a single compound breaks down to form two or more simpler substances.
19. Chemical equation with the same number of atoms of each element on both sides of the equation.
20. Matter is not created nor destroyed in any chemical or physical change.

1. A solution in which the solvent is water.
2. The reactant that is completely consumed in a chemical reaction, limiting the amount of product formed.
3. The reactants that bind to the enzyme.
5. A reaction in which two or more substances combine to form a new compound.
7. A substance combines with oxygen, releasing a large amount of energy in the form of light and heat.
8. The elements or compounds produced by a chemical reaction.
9. The minimum amount of energy required to start a chemical reaction.
11. Chemical agents that selectively speed up chemical reactions without being consumed by the reaction.
13. A chemical reaction in which heat is absorbed.
17. Catalysts for chemical reactions in living things.