3. The discovery of the neutron helped people understand A. how two atoms of the same element can have different atomic masses. B. why the nucleus has a positive charge. C. how electrons are attracted to the nucleus. D. why the nucleus is much more massive than the electrons in an atom.
3. The discovery of the neutron helped people understand A. how two atoms of the same element can have different atomic masses. B. why the nucleus has a positive charge. C. how electrons are attracted to the nucleus. D. why the nucleus is much more massive than the electrons in an atom.
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Transcribed Image Text:3. The discovery of the neutron helped people understand
A. how two atoms of the same element can have different atomic masses.
B. why the nucleus has a positive charge.
C. how electrons are attracted to the nucleus.
D. why the nucleus is much more massive than the electrons in an atom.
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