How many electron would balance one protone

This means that the negative charge on an electron perfectly balances the positive charge on the proton. In other words, a neutral atom must have exactly one electron for every proton. If a neutral atom has 1 proton, it must have 1 electron. If a neutral atom has 2 protons, it must have 2 electrons

1837 electrons

The mass of a proton is 1.673×10-27kg . Thus, 1837 electrons have the same mass as 1 proton

Explanation:

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your answer would be fusion