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OpenStudy (anonymous):
Defend James Chadwick's work on the atom and its contribution to the modern atomic model. plz help
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OpenStudy (michele_laino):
Historically speaking, Chadwick and Rutherford were the first scientists who measured the nucleus radius, using the alpha-particles. Furthermore, in the year of 193, the same Chadwick discovered a neutral particle, whose mass is approximately equal to the one of the proton. That particle was called neutron.
OpenStudy (anonymous):
thankyou @Michele_Laino
OpenStudy (michele_laino):
oops.. the year is 1931 Thank you! @stephaniehoran23
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