“Radioactivity is shown to be accompanied by chemical changes in which new types of matter are being continually produced. … The conclusion is drawn that these chemical changes must be sub-atomic in character.”

—  Ernest Rutherford

"The Cause and Nature of Radioactivity" in Philosophical Magazine (September 1902)

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Ernest Rutherford 16
New Zealand-born British chemist and physicist 1871–1937

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