combined with other chemical elements. If you had a certain amount of uranium, a certain number of uranium atoms, then you got a certain intensity of radiation. Nothing else made a difference. Normal properties, color or smell or hardness, changed according to how you treated a substance. Scientists of the time knew that such properties came from the way atoms combined with one another. The atoms themselves, most scientists believed, had all been created at the beginning of time, and could not possibly…
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