Chemistry

1. repeating pattern.
3. particles that form during chemical changes.
5. pure substance composed of two or more elements that are chemically combined.
8. gases/unreactive nonmetals.
9. representation of an object or a symbol.
11. substances formed from a chemical reaction.
12. combination of two or more substances that are not chemically combined.
13. charged particles found in all atoms.
15. mixture/ the same apperence and property throughout the whole mixture.

1. row of elements.
2. electrons/ electrons in their outter most energy level.
4. equation/a shorthand description of a chemical reaction using chemical formulas and symbols.
6. starting materials in a chemical reaction.
7. smallest particle into which an element can be divided and still be the same substance.
10. reactive nonmetals.
13. pure substance that cannot be seperated into simpler substances by chemical or physical means.
14. explanantion for a broad range of hypothosises and observations.