As many protons and electrons in a neutral atom. Far enough, an atom doesn't attract an electron, the net result is zero.
If for instance the electrons distribution at the atom has spherical symmetry, they create the same electric field as if their charge were concentrated at the centre. Same charge
same flux. Field of spherical symmetry too
But if an electron approaches a neutral atom, all electrons rearrange a bit, precisely because they repel an other, so their increased mean distance reduces the repulsion. The protons keep attracting the additional electron as much. As a net result, a neutral atom attracts one