The early universe was composed mainly of which two elements?
A) hydrogen and helium
B) carbon and oxygen
C) hydrogen and oxygen
D) carbon and iron

Name: The early universe was composed mainly of which two elements? A) hydrogen and helium B) carbon and oxygen C) hydrogen and oxygen D) carbon and iron
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The early universe, shortly after the Big Bang, was composed mainly of hydrogen and helium. Other elements, such as carbon and oxygen, were formed through nuclear fusion in stars later on.

The Early Universe Was Composed Mainly of Which Two Elements