What percentage of total elemental mass does Hydrogen account for in a typical star-forming region nebula?
Answer
75% to 77%
A representative sample of gas taken from a typical nebula, such as an emission nebula, reveals that hydrogen dominates the elemental mass, accounting for an estimated range of 75% to 77%. This quantification highlights the sheer volume of hydrogen relative to all other components, confirming its role as the primary ingredient for stellar birth. This ratio reflects the fundamental elemental composition established early in the universe's existence.
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