the atomic theory 1.atomic theory matching 2.atom size 3.democritus 4.dalton – ball model 5.j.j....
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The Atomic Theory1. Atomic Theory Matching2. Atom Size3. Democritus4. Dalton – Ball Model5. J.J. Thompson – Raisin Bun
Model6. Rutherford – Gold Foil
Experiment7. Bohr – Energy Level Model
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Whose theory was it anyways?
- WORKSHEET IS INCLUDED WITH LESSON PACKAGE
- Match the scientist with his model of the atom as well as his atomic explanation.
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How are atoms studied?
____________ Atoms are too small in size to study
easily Size of Earth : soda can ……………..Simulation Simulation Removed
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The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence of atoms
___________
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Dalton’s Atomic Theory – The Ball Model: 1800s
Referred to the atom as a small, hard, indestructible sphere that cannot be subdivided
___________ An atom is the smallest …………….
……………….
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J.J. Thomson
In 1897 J.J. Thomson demonstrated that ……………….
After further investigation he concluded that the same negatively charged ………….
___________
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Thomson’s Atomic Model• Thomson believed that the electrons were like plums embedded in a positively charged “pudding”
• ___________
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Ernest Rutherford’sGold Foil Experiment - 1911
“+” charged …………
___________
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What he actually found
Most of the alpha particles slightly deflected and carried on but some bounced backwards
___________
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Rutherford’s Findings Most of the particles passed right through A few …………………. ___________
……………..
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The Rutherford Atomic ModelBased on his experimental
evidence he concluded that the atom: …………….. Contains a …………..
___________
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The Bohr-Rutherford Model
_______________
Electrons move in ……………
Electrons more or less stay in their orbit unless ………….
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