What is the typical composition of a star?

Question

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Answer 1

Nuscorpi's right. There are some oddball red dwarf stars that have small molecule absorption or heavy metals or rare earths in their spectra.

Answer 2

Mostly Hydrogen.  Some Helium.  Some heavier elements depending on age and mass of the star (e.g. - Iron).

After supernova, heavier elements are formed and released into space.

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Answer 3

A typical newborn star would be made of 73 percent hydrogen, 25 percent  helium and 2 percent of all the other elements up to uranium. As stars consume their stores of hydrogen then helium the proportion of heavier elements increases until the star either explodes as a supernova or becomes a white dwarf.

Answer 4

Most stars 90percent Hydrogen,9percent helium one percent all other elements like Iron or sodium!