HYDRICK's Atomic History Crossword

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Across
  1. 4. organized periodic table by atomic number
  2. 8. Who discovered the first subatomic particle
  3. 9. where electrons are located
  4. 11. A region of an atom in which electrons of the same energy are likely to be found
  5. 12. Bohr suggested that electrons were in ______ orbits or energy levels around the nucleus
  6. 15. Cloud Model The Modern Model is also called
  7. 16. Who offered the first modern theory of the atom
  8. 18. According to Dalton, atoms are invisible and _____________
  9. 20. The Modern Model is based on the types of physics called
  10. 22. Thomson's model was also known as the
Down
  1. 1. Protons, neutrons and electrons are all
  2. 2. organized periodic table by atomic mass
  3. 3. Electrons or the "cloud" accounts for most of the _____ of the atom
  4. 5. What famous experiment did Ernest Rutherford perform
  5. 6. The negatively charged particles
  6. 7. simplest piece of matter
  7. 10. Greek word meaning "uncuttable"
  8. 13. came up with the word 'atom'
  9. 14. The positively charged particles
  10. 17. Bohr Who's model resembles the planets orbiting around the sun
  11. 19. The central core of the atom
  12. 21. Rutherford concluded that the atom was mostly _____ space with electrons moving around the nucleus