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21 Cards in this Set
- Front
- Back
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Democritus |
He proposed the existence of the atom |
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Aristotle |
He thought that all substances were built up from only FOUR ELEMENTS. |
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Earth Water Fire Air |
What are the 4 elements that aristotle thought that all substances were built up |
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John Dalton |
A british chemist ; “all substances of atoms that cannot be created, destroyed or divided” |
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Solid sphere or bowling ball model Was proposed by John Dalton |
What is the name of this model? And who is the proponent? |
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J. J Thomson |
He discovered the 1st subatomic particle; “atoms contain negatively charged particles and positively charged matter” |
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Plum pudding or the raisin bun model Was proposed by J. J Thomson |
What is the name of this atomic model? And who is the proponent? |
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J. J Thomson |
He discovered ELECTRONS |
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Electrons |
What is the 1st subatomic particle found? |
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Ernest Rutherford |
He discovered the NUCLEUS and PROTONS ; “electrons travel around the nucleus, but their exact places cannot be described” |
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Ernest Rutherford |
He discovered the NUCLES and the PROTONS |
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Nuclear model Was proposed by Ernest Rutherford |
What is the name of this atomic model? And who is the proponent? |
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Niels Bohr |
He discovered ENERGY LEVELS; “electrons travel around the nucleus in definite paths and fixed distances” |
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Niels Bohr |
Who discovered ENERGY LEVELS |
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Bohr’s model And was proposed by Niels Bohr |
What is the name of this atomic model? And who is the proponent? |
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Erwin Schrödinger |
He developed the ELECTRON CLOUD MODEL ; “the exact path of the electrons cannot be predicted” |
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Electron Cloud model Erwin Schrödinger |
What is the name of this atomic model? And who is the proponent? |
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James Chadwick |
He discovered the neutrons |
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Electrons |
Negatively charged particles |
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Protons |
Positively charged particles |
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Neutrons |
a particle that has no charge |
