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Answer :
According to Rutherford’s model of an atom, the positively charged protons are present in the nucleus of an atom.
The atomic number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element.
The mass of a proton is 1.673 × 10-27 kg and charge on the proton is +(1.6 x 10-19) Coulomb.