Solar abundances (in number) H 0.907695 He 0.0907695 C 3.77630d-04 N 9.93200d-05 O 7.89030d-04 Ne 1.25110d-04 Na 2.27190d-06 Mg 4.04650d-05 Al 3.14690d-06 Si 3.77630d-05 S 1.72700d-05 Ar 3.53070d-06 Ca 2.44080d-06 Sc 1.45700d-09 Fe 3.44470d-05