Which scientist proposed the "plum pudding model" of the atom?
J.J. Thompson
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What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?
Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Neils Bohr
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15
In the model nicknamed "the solar system model" what are the electrons like?
The planets
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This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. It shows electrons floating freely in a positive region.
The "Plum Pudding Model" of the atom
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15
Place the following atomic models in order, from earliest to latest: A) Rutherford B) Thomson C) Dalton
C, B, A
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Which model was created after the discovery of the nucleus?
B
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This model was the first to show a nucleus, consisting of protons and neutrons. Electrons surround the nucleus but are not shown in distinct energy levels.
Planetary model or Rutherford's model
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15
Which model was created after the discovery of the electron cloud?
C
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Which scientist proposed that all matter is composed of atoms, which he assumed were indivisible and indestructible building blocks of nature.
John Dalton
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Dalton developed the first scientifically tested atomic theory. (T/F)
True
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This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.
Democritus model
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Aristotle and other early Greek philosophers thought that matter was composed of four elements: air, earth, fire, and water(T/F)
