Distribution of elements in the solar system

Why does it appear that the heavier elements (carbon, nitrogen, oxygen, silicon, nickel, iron) are concentrated in the planets rather than the sun? I realize that this may not actually be the case, as Jupiter and Saturn may be mostly hydrogen, as may be Uranus and Neptune. Is it simply that gases like hydrogen and helium could not condense into little packets the size of Earth, and so were gobbled up by the sun and the gas giants, while heavier elements that could form into solids such as silicon, oxygen, iron, and nickel condensed into planets where convenient but also fell into the sun and larger gas giants in proportion?

I'm still taking in that article, but it's quite interesting! And from a reputable source, it appears, too!