🚀 go-pugleaf

The question is why?  Why periodic, that is?
  If a new element, from hydrogen onwards, is created or evolved, then why 
shouldn't it have entirely new characteristics from its predecessors?
  Unless, for any given dynamic (causal) universe, there is a limited number 
of functional features which are needed.  Hence, recurrence of physical or 
chemical attributes tends to prevail.
  So, while Evolution of the Elements may involve accretion of more protons, 
neutron, electrons, etc, the result is not an infinite accompanying gain in 
characteristics, but a repeat in various ways - somewhat like adaptive 
radiation when one type of animal or plant replaces another in a given 
habitat.  Except, in the case of the elements, it is supplemental.
  And when we reach Uranium, the accretion is so excessive as to be 
unstable.