Immediately after the big bang, the universe contained
A) only matter.
B) equal amounts of matter and antimatter.
C) slightly more matter than antimatter.
D) slightly more antimatter than matter.

Question

Quizplus · Accepted Answer

According to current understanding, during the first moments of the universe, there was an equal amount of matter and antimatter. However, as the universe cooled, some of the matter and antimatter particles annihilated each other, leaving behind a slight excess of matter. This excess of matter is what allowed stars and galaxies to form, leading to the universe that we observe today.

Immediately After the Big Bang, the Universe Contained