Chemistry Crossword

2. shiny, malleable, ductile element that conducts electricity
4. chemical reaction that releases energy
5. atom that has become electrically charged because it has lost or gained electrons
8. the smallest part of an element that is representative of that element
10. change of state from a gas to a liquid
13. group of atoms joined by covalent bonds
15. compound that dissolves in water to form a solution with a pH lower than 7
17. element that has both metallic and non-metallic properties
18. chemical combination of two or more elements in a specific ratio
21. ability to do work
22. invisible negatively charged particle that orbits the nucleus of an atom
23. combination of pure substances

1. anything that has mass or occupies space
2. description of a substance that can be pounded or rolled into sheets
3. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
5. substance that strongly resists the flow of electricity
6. chemical reaction that absorbs energy
7. ability of a substance to conduct electricity or heat
9. pure substance that cannot be broken down into other substances
11. atomic mass unit
12. a material that electric charge can move through easily
14. catalyst involved in chemical reactions in living things
16. conductor through which electric current enters or leaves a device or material
19. amount of mass in a given volume of a substance
20. change of state from a solid to a liquid