Across
- 1. used to make bricks and cement
- 6. used the first letter of the name of an element
- 8. used for hundreds of years to kill germs
- 14. found in seafood and in all fireworks
- 15. a poison that might be found in well water
- 17. electrons in the outermost level
- 19. grouped elements by eights
- 20. the side metals are on
- 21. used for computer circuits
- 23. group 1A
- 24. turn nitrogen into a form usable by plants
- 25. use of gallium in a computer
- 26. used in fluorescent light bulbs
- 27. strong, light-weight, used in space telescope
- 29. glows in the dark and causes cancer
- 30. partly like metals and partly like nonmetals
- 33. arranged elements by atomic number
- 34. a form of this helps prevents cavities
- 35. made symbols that were too complicated
- 38. how well atoms attract electrons
- 40. metal that melts in your hand
- 41. a row of the periodic chart
- 43. found in cleaners, green fireworks, heat-resistant glass, fire-retardant, treated lumber, etc.
- 45. using sulfur to make rubber
- 47. makes up most of the atmosphere
- 48. the side the nonmetals are on
- 49. how many valence electrons carbon has
Down
- 2. group 2A
- 3. left blanks for undiscovered elements
- 4. so light it leaves the atmosphere
- 5. a column of the periodic chart
- 7. makes fireworks red
- 9. used to kill mold and prevent fires
- 10. burned it in class
- 11. made by plants during the day
- 12. will not react with other substances
- 13. all the B elements
- 16. gotten naturally from seafood, kills germs
- 18. makes an orange colored light
- 22. grouped elements by threes
- 28. needed to live, but it can also kill
- 31. purifying metal with very hot temperatures
- 32. started using symbols to identify a substance
- 36. when combines with a metal it forms a salt
- 37. where silicon is found
- 39. something nitrogen can be used for
- 42. the most abundant metal
- 44. second most abundant element
- 46. found in all living things