reactions

2. one of the distinct forms in which matter can exist.
4. a chemical process involving the exchange of bonds between two reacting chemical species which results in the creation of products with similar or identical bonding affiliations.
6. a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
8. the artificial execution of useful chemical reactions to obtain one or several products
9. a type of ordering system for elements
10. predict the chemical reactions that will take place when two chemicals are combined.
12. a "reaction for which the overall standard enthalpy change ΔH⚬ is negative."
14. a substance that takes part in and undergoes change during a reaction.
16. molecules composed of only two atoms, of the same or different chemical elements.
17. a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.
18. mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
19. a conversion factor between compounds in a chemical reaction
20. the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution.

1. the symbolic representation of a chemical reaction in the form of symbols and formulae
3. a constant term related to the properties of a product.
5. any process with an increase in the enthalpy H of the system
7. a chemical reaction in which one element is replaced by another in a compound.
8. the ability of a solid, liquid, or gaseous chemical substance
10. the species formed from chemical reactions.
11. a chemical reaction between substances, usually including oxygen
13. a substance (solid) that will not dissolve in a solvent even after mixing
15. the process or effect of simplifying a single chemical entity into two or more fragments.