atoms and neutrons
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| early philosophers wondered about the ___________ ___________ of matter | fundamental nature
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| what were the contrasting ideas? | it was infinitely divisible or only divisible until a fundamental unit was reached
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| (400 bc) called nature's basic particle an atom, meaning 'indivisible' [believed it physically resembled the matter it made] | Democritus
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| was much more influential and his opinion that matter could be infinitely divided prevailed for almost 200 years (combination of 4 elements) | Aristotle
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| 1800s proposed elements were composed of atoms and only whole numbers of atoms can combine and form compounds | Dalton
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| 1. atoms are divisible 2. an element can have atoms with different masses | modern atomic theory
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| the discovery of ________ _______ disproved Dalton's "indivisible" atom | subatomic particles
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Created by:
mmurray13
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