Electrons and protons in an atom are constantly in motion, for the circular motion to be stable what conditions in an atom should be fulfilled?
1) The attractive force between the electrons and protons should be greater than the centrifugal force
2) The attractive force between the electrons and protons should be equal to the centrifugal force
3) The attractive force between the electrons and protons should be less than the centrifugal force
4) The attractive force between the electrons and protons should be in the opposite direction of the centrifugal force