Table 3: Gas phase abundances relative to H nuclei.
Element Relative abundance
He $1.0 \times 10^{-1} $
C $2.0 \times 10^{-4} $
O $5.0 \times 10^{-4} $
N $7.5 \times 10^{-5} $
S $1.3 \times 10^{-6} $
Fe $2.5 \times 10^{-7} $

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