Sagot :
It would be Hydrogen. Because stars, especially the sun, a main sequence star of its age, has 70 percent hydrogen by mass and 90 percent by number of atoms.
The following elements are the top ten most abundant matter in the sun:
Hydrogen
Helium
Oxygen
Carbon
Nitrogen
Silicon
Magnesium
Neon
Iron
Sulfur
The following elements are the top ten most abundant matter in the sun:
Hydrogen
Helium
Oxygen
Carbon
Nitrogen
Silicon
Magnesium
Neon
Iron
Sulfur
It would be hydrogen. Though, hydrogen and helium are the primary elements of the universe.