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| ...Ernest Rutherford discovered the Alpha and Beta particle beams. He then shot the particle beams at a peice of gold about 1/3000 of an inch thick. Most of the particles passed through the gold. | |
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| I wonder if some of the particles bounced back at him, causing him to realize that the main mass of the atom is located in the nucleus, which is many times smaller than the atom itself. | |
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| Rutherford's colleague, Bohr, saw that Rutherford's model of the atom wasn’t correct. Bohr said that electrons jumped from place to place, instead of always being present in the orbit. | |
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| HO HO HO! Hello little girl. What would you like Santa to bring you for Christmas? | |
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| Hans Geiger created a device that counted alpha particles and helped figure out that alpha particles had, not one, but two units of charge. He stated that the nucleus makes up most of the atom's mass. | |
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