which fundamental particle of an atom has mass more than proton
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Neutrons...
Electron < Proton < Neutron
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Answer:
Neutron with the fundamental particle of an atom slightly heavier than proton.
Explanation:
A Mass of proton "1.6726219 × 10-27" kilograms. And, mass of a neutron "1.674929 x 10-27" kg. Then, mass of neutron is slightly heavy than that of proton.
If we look in relativity point of view, proton and electron merges to make a neutron. So, mass of negligible mass of electron actually makes the neutron a bit heavier than that of proton.
The charge balance is also done by neutralizing positive charge of proton and negative charge of electron.
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