Source: The big bang

H                                                  He
.. ..                               .  .  .  .  .  ..
.. ..                               .. .. .  .  .. ..
.  .. .. .. .  .. .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .  .. .. .. .. .. .. .. .. .. .. .. .. .. .  ..
.. .. .. .. .. .  .. .. .. .. .. .. .. .. .. .. .. ..
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..

      .. .. .. .. .. .. .. .. .. .. .. .. .. ..
      .. .. .  .. .. .. .. .. .. .. .. .. .. ..

 1 H  Hydrogen
 2 He Helium

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