The most abundant elements in the universe and the Earth's crust are, respectively,
A) oxygen and iron.
B) hydrogen and helium.
C) helium and carbon.
D) hydrogen and oxygen.

Question

Quizplus · Accepted Answer

Hydrogen is the most abundant element in the universe, primarily due to its presence in stars, including the Sun. Oxygen is the most abundant element in the Earth's crust, found in water and many minerals.

The Most Abundant Elements in the Universe and the Earth's