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Chapter 4: chemistry

atoms and neutrons

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