Across
- 4. Combining small nuclei
- 7. Electron goes back to lower energy state
- 9. Metal transfers valence electrons to a nonmetal
- 13. Mixture not uniform throughout
- 14. Same element, different mass
- 17. Property based off of element
- 18. Type of property than can be observed
- 22. Determines element
- 23. Most dangerous type of radiation
- 24. Elements also in the third, fourth, fifth, and sixth column, and the seventh; forms staircase
- 29. Came up with modern-day atomic model (not including neutrons) and elctron cloud
- 31. Splitting large nuclei into smaller
- 32. Figuring out what a substance is
- 33. aka rows
- 34. necessary info for elements (abrv.)
- 36. Decay that changes things by -2
- 38. Size of an atom
- 39. ow much an atom wants to be full
- 40. Discovered protons and neutrons
- 41. Leucippus and Democrirtus came up with this concept
- 42. Proved atoms and compounds existed; came up with Law of Conservation of Mass; no subatomic particles
Down
- 1. inert and have full valence shell
- 2. These ___ are multivalent
- 3. Electron moves to next energy level
- 5. Elements not comprised of metal (covalent)
- 6. Gasses with full valence shells
- 8. Property based off of amount
- 10. energy it takes to remove electron
- 11. Type of property based off of reactivity or ___ composition
- 12. Helps determine AMU; isotope
- 15. Elements in the seventh column
- 16. aka column
- 19. Mixture that is uniform throughout
- 20. Metals in the third, fourth, fifth, sixth columns
- 21. Proved electrons
- 25. Metals all the way on the left
- 26. Metals in the second group
- 27. Metals between the second and third group
- 28. Nonmetals that share electrons
- 30. Determines charge of an atom
- 35. Decay when electron is kicked out
- 37. Proved electrons exist in a fixed orbit