Chemistry Crossword

3. amount of mass in a given volume of a substance
4. a group of 17 elements on the periodic table
6. chemical combination of two or more elements in a specific ratio
7. description of a substance that can be pounded or rolled into sheets
8. a extremely small thing
10. an atom that has lost or gained electrons
11. when oxygen reacts with another substance and creates energy
13. when 2 or more substances react
15. ability of a substance to conduct electricity or heat
16. change of state
18. a non-metal combined with a pure substance
19. a thought that people generally accept
20. during a reaction the product can escape
23. a table in which the elements are organized by their physical and chemical properties

1. group of atoms joined by covalent bonds
2. materials at the start of a reaction
5. group 18 elements in the periodic table
9. During a reaction the product cannot escape
12. pure substances formed when non-metals combine
14. Things are made up of __________
16. new materials created by a reaction
17. slow chemical change that occurs when oxygen in the air reacts with a metal
21. a vertical column of elements in the periodic table
22. change of state
24. a material that electric charge can move through easily