some charges gets induced on the other sphere

What will be the electrostatics force between two steel spheres each weighing 1 kg and separated by 1 m if each one of them has one percent more electron than protons.
This is from Irodov where it is written iron sphere and mass = 1g
u know atmass of Ag =108
so find no of moles and thereby no of atoms
u know atomic no so find tot no of protons
now excess negative charge =1/100 no of protons X electonic charge
use F =KQ2/r with r= 1m
u may assume sphere to be small enuf to ignore induced charges