Across
- 4. pure substance that cannot be broken down into other substances
- 6. an experiment in which one or more products of a chemical reaction can escape
- 8. the smallest part of an element that is representative of that element
- 9. principle that matter is not created or destroyed in a chemical reaction
- 11. Vertical columns in the periodic table
- 12. change that results when two or more substances react to create a different substance
- 16. property that describe the physical appearance of a substance
- 20. group 17 elements in the periodic table; most reactive non-metals
- 21. element that has both metallic and non-metallic properties
- 22. measure of atomic mass
- 25. description of a solid that can be stretched into a long wire
Down
- 1. an experiment in which all reactants and all products of a chemical reaction are accounted for
- 2. the temperature in which a solid will melt
- 3. chemical reaction that absorbs energy
- 5. new substance produced in a chemical reaction between reactants
- 7. pure substance formed when non-metals combine
- 10. Comes from the Arabic word "alkimiya", meaning "the chemist"
- 13. chemical reaction that releases heat
- 14. slow chemical change that occurs when oxygen in the air reacts with metal
- 15. description of a substance that can be pounded or rolled into sheets
- 17. atom that has become electrically charged because it has lost or gained electrons
- 18. Horizontal row in the periodic table
- 19. substance that reacts with other substances in a chemical reaction to create new substances with different properties
- 23. Anything that has mass and occupies space
- 24. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy