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The Historical Development of Atomic Theory
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What could J. J. Thomson conclude from his experiments?
Atoms must balance positive and negative particles.
Whose work directly resulted in the development of an atomic model that has negative electrons stuck within a sea of positive material?
Thomson
Which activity is the best demonstration of J.J. Thomson’s use of creativity in his work?
Interpreting the results of his experiment
Which activity BEST demonstrates Ernest Rutherford's creativity?
Designing an experiment to test the plum pudding model
Which statement BEST describes John Dalton's use of creativity in his work?
He reinterpreted and retested Joseph Proust's results.
Which statement BEST summarizes the importance of Ernest Rutherford's gold foil experiment?
It showed that a nucleus occupies a small part of the whole atom.
What did Ernest Rutherford's gold foil experiment demonstrate about atoms?
Their positive charge is located in a small region that is called the nucleus.
Which conclusion could be made from Ernest Rutherford's gold foil experiment?
Atoms are made up of mostly empty space.
Which statement is MOST LIKELY true?
Ernest Rutherford's experiment led to the nuclear model of the atom.
Which particle is J.J. Thomson credited with discovering?
electron
Which atomic model was proposed as a result of J.J. Thomson's work?
the plum pudding model
Which BEST describes the effect of J.J. Thomson's discovery?
The accepted model of the atom was changed.
From his experiments, J.J. Thomson concluded that
atoms contain small negatively charged particles that are called electrons
How did the development of the earliest idea about atoms differ from the later work of scientists?
It was based on the thoughts of an early philosopher.
Which scientist is credited with developing the first scientific atomic theory?
John Dalton
Which scientist provided a foundation for John Dalton's work on the atomic structure?
Joseph Proust
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