Chemical Reactions

1. the state or process of rotting; decay
3. relating to, composed of, or using ions
7. relating to or consisting of molecules
10. a substance that takes part in and undergoes change during a reaction
12. an element or substance that is not a metal
14. the combination of ideas to form a theory or system
17. a substance that flows freely but is of constant volume, having a consistency like that of water or oil
18. a thing that is composed of two or more separate elements
20. consisting of two atoms

2. consisting of one atom
4. a process that involves rearrangement of the molecular or ionic structure of a substance
5. a numerical or constant quantity placed before and multiplying the variable in an algebraic expression
6. a part or aspect of something abstract, especially one that is essential or characteristic
8. a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape
9. symbolic representation of a chemical reaction in the form of symbols and formulae
11. the process of burning something
13. the species formed from chemical reactions
15. a character, usually a letter or number, that's printed slightly below and to the side of another character
16. firm and stable in shape; not liquid or fluid
19. a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity