The driving force behind chemical reactions between elements is the attraction of electrons of different atoms.
Chemical reactions involve the transfer or sharing of electrons between atoms to form new chemical bonds, and the stability of the resulting compound depends on the arrangement of electrons in the outermost energy level of the atoms involved. The interaction of the electric fields of protons and electrons, as well as the attraction of protons of different atoms, do play important roles in determining the behavior of atoms, but they are not the primary driving force behind chemical reactions. The interaction of the electric fields of neutrons and electrons is not significant in chemical reactions because neutrons do not have an electric charge.