Who was the first to propose that matter consist of indivisible particles of matter called atoms?
Democritus
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15
Which model was created after the discovery of the electron cloud?
C
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Who was the first person to "think" of an atom?
Democritus
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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
Which scientist proposed the "plum pudding model" of the atom?
J.J. Thompson
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This Greek philosopher stated matter was made of four main elements - water, air, earth and fire.
Aristotle
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15
Which model of the atom is the most up to date model?
Quantum model
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In the model nicknamed "the solar system model" what are the electrons like?
The planets
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Whose model suggested that negative particles were mixed in with positively charged material - like plums on a pudding?
J.J. Thompson
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Ernest Rutherford discovered that atoms were mostly
Empty space
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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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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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Dalton developed the first scientifically tested atomic theory. (T/F)