THE HISTORY OF THE ATOM, PART II!
1. Who shot alpha particles at gold atoms, and watched some of them bounce back?
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2. What was discovered in the atom, that the alpha particles were bouncing off of?
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3. Why did the alpha particles bounce off of the nucleus?
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4. What was the new model of the atom called, where all of the protons were in the center, and
the electrons were on the outside? ____________________
5. Most of the atom is actually just… ____________________
6. Who figured out that atoms can give off colored light, when they are hit with electricity?
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7. How many colors should a hydrogen atom give off? ____________________
8. How many colors DID a hydrogen atom REALLY give off? ____________________
9. What was the name of the new model that Bohr came up with, that said electrons travel in
different energy levels around the nucleus?
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10. Electrons give off light in an atom when they….
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11. How many electrons can the first energy level hold?
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12. How many electrons can the second energy level hold?
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13. How many electrons can the third energy level hold?
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14. How many electrons can the fourth energy level hold?
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15. Name the four models, in order, that we have studied:
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16. What was the most important reason that scientists wanted to learn about the atom?
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