Matter

6. one or two letter representation of an element
8. characteristics of a substance that determine how it will react with other substances
11. change in a substance that does not involve a change in the identity of a substance
12. two or more elements chemically combined
15. the ability of something to be reshaped without breaking

1. combination of two or more substances which do not chemically combine
2. characteristics that can be observed or measured without changing the substance
3. smallest unit of an element
4. change in matter that produces one or more new substances
5. substance that cannot be broken down into any other substance by chemical or physical means
7. the ability of a substance to transfer heat or electrical current
9. group of elements that are good conductors of electric current and heat
10. elements typically not shiny, usually a gas or brittle solid, not malleable, and poor conductors of electricity
13. elements that have properties of both metals and non-metals, sometimes referred to as semiconductors
14. any form of matter that is uniform throughout and has consistent properties