Science Crossword

2. Group of atoms bonded together
4. Formula, a set of chemical symbols showing the elements present in a compound
6. pure substance that cannot be broken down.
8. a material composed of two or more different substances that are physically combined. Heterogeneous, Mixture that is not uniform throughout
9. change, A change that produces an odor or changes temperature.
12. large number in the front that shows the number of molecules
15. A substance that is uniform throughout.
17. A substance that is formed as a result of a chemical reaction,
18. Change, A change in form or appearance

1. A poor conductor; often brittle.
2. anything that takes up space
3. Reaction, when two or more substances are changed into others through chemical means.
5. a small number written below letters in chemical formulas to indicate the number of atoms of a specific element
7. ,A substance that takes part in/undergoes a change during a reaction
10. Good conductor; lustrous
11. Table, A table of elements including metals, nonmetals and metalloids.
13. Smallest unit of a chemical element
14. Two or more elements combined
16. An element that has some metal and nonmetal properties