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feb 10, 1940 - He discovered electrons and Thomson is also credited with finding the first evidence for isotopes of a stable (non-radioactive) element in 1913

Description:

J . J . Thomson

Added to timeline:

Jamiyah Polite & Anyliah Middleton

13 Oct 2017

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Date:

feb 10, 1940

Now

~ 86 years ago

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