matter

1. usually a one- or two letter set of charaters that is used to identify a element
4. the chemical products created in chemical reaction
6. A combanation of symbols that shows the ratio of elements in a compound
8. A process in which substances undergo chemical changes
9. the number of protons and neutrons in the nucleus
10. A substance that takes part in and undergos change during a reaction
11. the central core of an atom,containing protons and usually neutrons
12. A combanation of two or more atoms that are bonded together
15. a display of chemical elements to organize
16. A symbolic representation of a chemical reaction in form of symbols
17. the smallest particle of an element
19. two or more substances that are mixed together but not chemicaly combined
23. electrons in the outer shell of an atom
26. the number of protons in the nucleus determines location in the periodic table
28. A transfer of electrons between a metal and a nonmetal
29. small positively charged particle in the nucleus of an atom
30. a tiny negitivity charged high-energy particle that moves in the space outside the nucleus of an atom

2. particles smaller than atoms:protons neutrons or electron
3. A change that alters the form or appearence of a substance but does not make the material into another substance
5. A stubstance made of two or more elements chemically combined
7. A change in matter that produces new stubstances
13. the force that holds two atoms together
14. A single kind of matter that has distinct physical and chemical properties
18. anything that has mass and occupies space
20. chemical bond with shared electrons between two nonmetals
21. A numeral or constant quantity placed before and multiplying the variable
22. A region of negative charge surrounding an atomic nucleus
24. atomic mass unit-number of protons and neutrons
25. A substance that cannot be broken down into other substances by chemical or physical means
27. small uncharted particle in the nucleus of an atom