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jan 1, 1902 - First Mention of elements with different numbers of neutrons (neutrons not discovered yet)

Description:

radioactive decay, which was first associated with transmutation of elements by Ernest Rutherford and Frederick Soddy

Added to timeline:

History of isotopes

6 Nov 2019

0

0

284

Date:

jan 1, 1902

Now

~ 123 years ago

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