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3 April, 14:35

In 400 B. C., a Greek philosopher named Democritus theorized that matter is made of simple parts. He called these parts atoma, or atoms. In 1897, a British physicist named Joseph Thomson discovered electrons. He theorized that atoms were positively-charged spheres, and negatively-charged electrons were embedded in the sphere. A few years later, in 1913, another physicist named Niels Bohr theorized that atoms had a positively-charged nucleus, and negatively-charged electrons orbited the nucleus. This information demonstrates how

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  1. 3 April, 17:23
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    D

    Explanation:

    Just did it in study island
  2. 3 April, 18:27
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    scientific theories are often modified, but they are not usually discarded.
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