What was the chemical makeup of the universe several hours after the expansion began?
A)Almost entirely hydrogen and helium
B)All of the known elements were present
C)Entirely hydrogen
D)A range of elements up to and including iron

Question

Quizplus · Accepted Answer

The universe was mostly composed of hydrogen and helium shortly after the Big Bang, with traces of some other elements. The heavier elements were formed later through processes like fusion in stars.

What Was the Chemical Makeup of the Universe Several Hours