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jan 1, 1903 - Lord Rutherford announces that radioactivity is caused by the breakdown of an atom.

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Lord Rutherford was a British physicist who discovered that radioactivity is caused by the breakdown of the atom.

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The Historical Development of the Period Table

ByJoshua Martin

20 Jan 2020

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Date:

jan 1, 1903

Now

~ 122 years ago

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