|
Title: What fraction of the mass of the universe is in the form of atoms other than hydrogen and helium? Post by: doit_the_clown on Mar 17, 2017 What fraction of the mass of the universe is in the form of atoms other than hydrogen and helium?
A) 10% B) Much less than 1% C) 2% D) 50% Title: Re: What fraction of the mass of the universe is in the form of atoms other than hydrogen and ... Post by: papachulo on Mar 17, 2017 Content hidden
|