what is the primary chemical component of most stars.?

Answer 1

When stars form they are composed of about 70% hydrogen and 28% helium, as measured by mass, with a small fraction of heavier elements. Typically the portion of heavy elements is measured in terms of the iron content of the stellar atmosphere, as iron is a common element and its absorption lines are relatively easy to measure. Because the molecular clouds where stars form are steadily enriched by heavier elements from supernovae explosions, a measurement of the chemical composition of a star can be used to infer its age.[43] The portion of heavier elements may also be an indicator of the likelihood that the star has a planetary system.[44]

The star with the lowest iron content ever measured is the dwarf HE1327-2326, with only 1/200,000th the iron content of the Sun.[45]

Answer 2

starting at the birth of a star, it would first suck in the things it is easiest to get. the easiest to get will be the easiest to pull which is hydrogen, as stars age and fusion process changes hydrogen to helium and all the way up to iron, at the oldest age star i would imagine the difference in composition would not be so tilted to hydrogen as it was at first. and would then be made up of maybe the same portion of helium

Answer 3

Hydrogen