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The first person to discover that atoms were made up of individual "parts" while working on phosphorescent substances was _____. Marie Curie J.J. Thompson Henri Becquerel Enrico Fermi
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The first person to discover that atoms were made up of individual "parts" while working on phosphorescent substances was _____.

Marie Curie
J.J. Thompson
Henri Becquerel
Enrico Fermi

User MWO
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Henri Becquerel  choice C 
User Joey Dalu
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I am 100% sure that it is J.J. Thompson because I searched all of the names in the options and found out there discovery's.
User Jstr
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