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- 1. Multiple Choice
Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?
J.J. Thomson
Ernest Rutherford
Niels Bohr
Albert Einstein
- 2. Multiple Choice
Who discovered that the atom had an small, dense, positively charged center?
Ernest Rutherford
J.J Thomson
Robert Millikan
John Dalton
- 3. Multiple Choice
Place the following atomic models in order, from earliest to latest:
A) Rutherford B) Thomson C) Dalton
B, C, A
C, A, B
A, C, B
C, B, A
- 4. Multiple ChoiceWhat can you conclude from the fact that scientists continue to update the atomic model?New information about atoms continues to be discoveredOld information about atoms is completely uselessScientists did not have any information about atoms until a few years agoScientists still have no idea what atoms look like
- 5. Multiple Choice
Who named the positive center of the atom the "nucleus?"
Democritus
Dalton
Thomson
Rutherford
- 6. Multiple Choice
Which scientists believed an atom was indivisible? (Choose all correct responses.)
Democritus
Dalton
Thomson
Rutherford
- 7. Multiple Choice
Which scientist discovered that the atom has parts - which means it can be divided?
Democritus
Dalton
Thomson
Rutherford
- 8. Multiple Choice
Which scientist first suggested that atoms could join?
Democritus
Dalton
Thomson
Rutherford
- 9. Multiple Choice
Which scientist believed that elements differed from one another because their atoms had different mass?
Democritus
Dalton
Thomson
Rutherford
- 10. Multiple Choice
In the atomic model nicknamed the "plum pudding" model, what do the plums represent?
the nucleus
the atom
the electrons
the positive material
- 11. Multiple Choice
Which scientist proposed a new atomic model after discovering the electron in 1897?
Dalton
Thomson
Rutherford
Bohr
- 12. Multiple Choice
Who discovered that atoms are mostly empty space?
Dalton
Thomson
Rutherford
Bohr
- 13. Multiple Choice
Which scientist was the first to benefit from the Lavoisier's efforts to define pure substances in the 1700's?
Dalton
Thomson
Rutherford
Bohr
- 14. Multiple Choice
In the model nicknamed "the solar system model" what are the electrons like?
the sun
the nucleus
the planets
the moon
- 15. Multiple Choice
Who proposed that electrons move around the nucleus in circular orbits?
Dalton
Thomson
Rutherford
Bohr
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