Question

How can we prove that proton of an atom is in the centre of the atom ?

Answer 1

heya dear frnd here is your answer
actually neutron is in the center of atom
not only the proton they both in together because we call a atom as electrically neutral

Answer 2

The gold foil experiment and later work by Rutherford allows us to calculate the size of the nucleus relative to the total size of atoms in the gold. The size of the nucleus works out to be very small.
Atomic nucleus