chem. vocab

3. a chemical process in which substance reacts rapidly and gives off heat
4. an ion that contains more than one atom
5. a organic chemical compound that is composed exclusively of hydrogen and carbon atoms
6. The simple form of a chemical reation
9. in any given system that is closed to transfer matter in the system stays constant
10. number's that come after a symbol and below
14. a chemical reaction in which one reaction breaks down into two or more products
16. a set of rules to generate systematical names for chemical comounds
17. a process that occurs when two or more molecules interact to form a new product
19. a reaction in which one element replaces a similar element in a compound
20. the substance which participate in a chemical reaction

1. an expression that shows the elements in a compound and the relative proportions of those elements
2. a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.
7. he processes by which chemicals interact to form new chemicals with different compositions
8. a positive or negative charge on an atom
11. a substance that is present at the end of a chemical reaction
12. an equation for a chemical reaction in which the number of atoms for each element in the reation and the total charge are the same for both the reactants and the products
13. the production of chemical compounds by reaction from simpler materials
15. The number in front of the fromula
18. reactants and products are seperated by an arrow symbol