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OpenStudy (anonymous):
explain why most of the mass of an atom are found in the nucleus
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OpenStudy (gebooors):
In nucleus there ar protons and neutrons. Number of protons and electrons is same in Neutral atom. Proton is roughly 2000 times heavier Than electron.
OpenStudy (usman1995):
as a proton is roughly 1840 times heavier than an electron that's why
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