The most abundant elements in the universe are
A) hydrogen and helium.
B) oxygen and nitrogen.
C) iron and gold.
D) silicon and lithium.

Question

Quizplus · Accepted Answer

Hydrogen and helium are the most abundant elements in the universe, making up approximately 98% of all atoms. Other elements, including oxygen and nitrogen, make up only a small fraction of the total. Iron and gold are relatively rare in the universe, and silicon and lithium are also not as abundant as hydrogen and helium.

The Most Abundant Elements in the Universe Are