Atomic Theory

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Across
  1. 3. The mass on the periodic table are the ______________ mass of all the isotopes of that element
  2. 6. This color of light has the highest energy
  3. 7. This is the state of an electron normally
  4. 8. Thomson claimed that atoms actually contained small, negatively charged particles called ___________.
  5. 13. This number is equal to the number of protons plus the number of neutrons
  6. 16. This color light has the lowest energy
  7. 17. The symbol for these are composed of 1 capital letter and possibly a lowercase letter as well
  8. 21. These are the electrons on the outer most energy level
  9. 23. The range of all types of electromagnetic radiation.
  10. 25. This is released by an atom when an electron drops from the excited state to the ground state
  11. 26. The _________ number in isotope notation is the atomic number.
  12. 28. This is located in the nucleus and has a positive charge.
  13. 31. These are made up of multiple elements
  14. 32. The ______ number in isotope notation is the mass number.
Down
  1. 1. How often waves occur
  2. 2. This is the abbreviation of the element.
  3. 4. This is the state of an electron when it gains energy
  4. 5. This number tells you the identity of the element; the number of protons.
  5. 9. Bohr said that electrons existed in specific ___________ around the nucleus.
  6. 10. This principle states that electrons will occupy the lowest energy level first.
  7. 11. This is the only type of EM waves humans can see
  8. 12. How far apart the wave crests are from each other
  9. 14. Rutherford determined that atoms consisted of a very small ___________ that was positively charged.
  10. 15. This principle states that within a sublevel, place 1 electron per orbital before pairing them
  11. 18. This scientist used the gold foil experiment
  12. 19. This scientist proposed the postulates of Atomic Theory
  13. 20. This is located in the nucleus and has a neutral charge
  14. 22. atoms of the same element but different number of neutrons.
  15. 24. This is located in the cloud and has a negative charge
  16. 27. All of the ________ of an atom is located in the nucleus
  17. 29. This scientist experimented with the cathode ray tube
  18. 30. This principle states that no 2 electrons can have the same set of quantum numbers