Unit 2 Homework set

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Across
  1. 3. Chadwick Came up with the idea of neutron
  2. 5. of conservation of Mass Said since atoms or unbreakable them so Is the mass
  3. 6. Elements that have the same number of Protons but different number of neutrons
  4. 8. Number Number of Protons
  5. 9. Weight the weight in Amy of all the atoms in a compound
  6. 10. Millikan Performed the Millikan Oil Drop experiment
  7. 14. Charge There are more protons then electrons
  8. 15. figures All together the known value and the estimated value are called...
  9. 17. Dalton created the atomic theory
  10. 18. Doesn't have a charge
  11. 19. Avogadro's Number
Down
  1. 1. Charge More electrons than protons
  2. 2. has a negative charge
  3. 4. mass unit What does amu stand for
  4. 7. has a positive charge
  5. 11. Value one place past the last marking on your equipment
  6. 12. value Marking on your piece of equipment
  7. 13. Number Sum of the protons and neutrons
  8. 16. Elements that have unequal numbers of Protons and electrons
  9. 17. Thomson Used a Cathode Ray Tube