Across
- 5. group 17 in the periodic table
- 6. pure substance that cannot be broken down
- 7. releases energy
- 8. a description of how a substance reacts with another substance
- 11. smallest part of an element that is representative of that element
- 12. substance that helps a reaction proceed more quickly
- 13. principle that mass is the same in reactants and products
- 15. change of state from gas to solid
- 17. measure of atomic mass amu
- 19. chemical reaction that occurs when oxygen reacts and gives off energy
- 22. atom that has become electrically charged
- 23. mass of one atom of an element
- 24. amount of mass in a given volume
Down
- 1. group 2 elements in the periodic table
- 2. pure substance formed with at least one metal and one non metal
- 3. anything that has mass and takes up space
- 4. change of state from a liquid to solid
- 9. absorbs energy
- 10. a reaction that takes place when two or more substances form a new substance
- 12. an experiment in which all reactants and products are accounted for
- 14. group 1 elements in the periodic table
- 16. ability to conduct electricity
- 18. chemical combination of two or more elements
- 20. invisible negatively charged particle
- 21. number number of protons and neutrons in an element