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7.15
The Protoactive isotope family
  Protoactives are the most useful but most unstable sub-atomic structures for life in the Universe. Luckily, they are largely restricted to single structures as core fusion of Protoactives into "helium" type structures requires extremely high temperatures (over 20 million degrees Kelvin). As such, Earth is only exposed to single Protoactives, restricted to unstable Hydro and Helium type structures.  
   
  Protoactive atomic structures are also formed in our atmosphere, as well as from major disturbances such as Asteroid hits. However, Protoactive isotopes are rarer in the lower mass elements than compared to the higher elements (weakly fused cores via the effects of nature) that contain high numbers of protoactives.  
  This partly explains the phenomena that some elements above Calcium (20) tend to have more Neutrons than Protons. However, because the relative temperatures to form, Protoactives are much higher than Protons (and impossibly high for our Sun to create Helium Protoactive cores), Protoactives are in much lower numbers and behave like unstable Hydrogen atoms. Deuterium is an excellent example of a Protoactive Isotope. The Protoactive is more than strong enough to pull in two, sometimes three Neutrons (as in Tritium).  
     
     
 
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