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
E) nitrogen and oxygen

Question

Quizplus · Accepted Answer

The early universe was composed mainly of hydrogen and helium. These two elements were formed during the Big Bang and were the building blocks for the formation of stars and galaxies. Other elements were later formed from the fusion reactions that occur in the cores of stars.

The Early Universe Was Composed Mainly of Which Two Elements