You know...gravity has always been the "almost" electro-magnetic force in many ways...but if the electro-magnetic pull from the center of the planetary plane pulls polarized oxygen atoms close enough together to create air pressure...friction...etc.  This force would also therein pull the heaviest atoms closer towards the center...metallics / sediments etc.   Gravity is real...if we base it's identify off electro-magnetism...but fake if we give it, it's own category of force.  Gravity can be the understanding of planetary electro-magnetism...mainly because it's scale of operation...like "magma to lava"