Atoms and Isotopes

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Across
  1. 2. Discovered neutrons
  2. 3. Atoms become _____ if they lose electrons
  3. 5. Some of the alpha radiation was _____ proving the existence of a nucleus
  4. 9. ____ radiation used to disprove the plum pudding model
  5. 13. Has a radius of 1x10-14
  6. 14. ____ pudding model, early atomic model
  7. 15. ____ number: number of protons and electrons in an atom
  8. 16. Atoms with the same number of protons, different number of electrons
  9. 18. Neutral subatomic particle
  10. 20. Discovered electron shells
  11. 22. Ernest Rutherford proved nuclei were _____ charged
Down
  1. 1. Location of electrons
  2. 4. Neutrons have a mass of ____
  3. 6. ____ number: number of protons in an atom
  4. 7. The alpha particle experiments proved the nucleus was very ____
  5. 8. ____ particles are protons, electrons and neutrons
  6. 10. Electrons may move shells as they _____ radiation
  7. 11. Negative subatomic particle
  8. 12. Has a radius of 1x10-10
  9. 17. Protons have a mass of ____
  10. 19. Overall charge of an atom
  11. 21. Positive subatomic particle