Across
- 2. Metals group 1 in the periodic table, not including hydrogen
- 4. group 17 in the periodic table of elements
- 6. slow chemical change that occurs when oxygen in air reacts with metals
- 9. Number number of protons in the nucleus of one atom of an element
- 10. pure substance made up of only one type atom
- 11. anything that has mass and occupies space
- 13. an atom that has become electrically charged
- 15. vertical column of elements in the periodic table
- 17. substance that helps a chemical reaction to proceed more quickly
- 18. Gases group 18 in the periodic table
- 19. chemical combination of two or more elements in a specific ratio
- 21. amount of mass in a given volume of a substance
- 23. positively charged center of an atom
Down
- 1. combination of pure substances
- 3. Formula combination of symbols that represent a compound
- 5. dull, brittle element that does not conduct electricity
- 7. change of state from a solid to a liquid
- 8. description of a substance that can be rolled or pounded into sheets
- 12. change of state from a gas to a solid
- 14. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 16. System an experiment in which all reactants and all products of a chemical reaction are accounted for
- 17. Change a change in where 2 or more substances react to create a new substance with completely different properties
- 20. description of a solid that can be stretched into a long wire
- 22. Solution a solution in which water is the solvent