Eli5 Why was the sun made up of mainly just hydrogen when it was formed compared to inner planets that have so many more elements, especially higher ones?

Question

All,

I have a basic understanding that a lot of elements were brought to planets by comets, supernova explosions and so on.

Why didn’t the sun attract most of these comets and fragments from celestial explosions instead of the planets? And why was / is the sun mainly just hydrogen?

In: 105

Answer 1

Is there any reason to not believe that the same elements that make up the terrestrial planets, oxygen, silicon, iron, nickel, etc. aren’t also in the sun’s core, arriving there as dust and gas material accumulated and before the Sun protostar achieved fusion? Just buried underneath all of the hydrogen and helium, maybe in a plasma state?