Across
- 4. the path something travels along
- 5. column of elements on periodic table
- 8. mass of an element
- 9. horizontal row of periodic table
- 11. group of atoms bonded together
- 14. mass that can not be destroyed by a chemical reaction
- 17. a substance, periodic table is filled with them
- 18. solid material, malleable
- 19. good conductors
- 20. not a metal
- 22. heat reaction
- 24. no electric charge
- 25. the basic unit of a chemical element
Down
- 1. "the center"
- 2. substance formed by chemical reaction
- 3. negative electric charge
- 6. electrons on outermost shell
- 7. number of protrons in nucleus of atom
- 10. cold reaction
- 12. usually unreactive, gas elements
- 13. developed periodic table
- 15. essentially a picture/shape
- 16. substance that takes part in a reaction
- 21. composed of two or more elements
- 23. positive electric charge