Chemical Reactions

2. A rapid chemical reaction between a substance and oxygen, usually accompanied by the release of heat and light.
4. a chemical process in which a substance loses electrons.
7. A substance formed by the chemical combination of two or more elements in fixed proportions.
10. Substance that participate in a chemical reaction, undergoing change
12. A biological catalyst, usually a protein, that speeds up chemical reactions in living organisms.
13. Substance that are formed as a result of a chemical reaction.
15. A type of chemical reaction involving both oxidation (loss of electrons) and reduction (gain of electrons) processes.
16. solid formed in a chemical reaction
17. A substance that increases the rate of a chemical reaction without undergoing any permanent change itself.
18. process that leads to the chemical transformation of one set of chemical substances to another
19. The smallest unit of a compound that retains the chemical properties of that compound, consisting of two or more atoms bonded together.

1. The minimum amount of energy required to initiate a chemical reaction.
3. a lasting attraction between atoms or ions that enables the formation of molecules, crystals, and other structures
5. A chemical reaction in which a compound breaks down into simpler substances.
6. a reaction that absorbs energy from its surroundings, increasing the potential energy in the chemicals
8. a chemical reaction that releases energy by light or heat.
9. A chemical reaction in which two or more substances combine to form a more complex product.
11. The speed at which a chemical reaction takes place, typically measured by the change in concentration of reactants or products per unit time.
14. A symbolic representation of a chemical reaction, showing the reactants and products with their respective coefficients.
15. chemical process in which a substance gains electrons.