The Sun is primarily composed of which elements?

The Sun is primarily composed of which elements?

• A. Hydrogen and Helium
• B. Oxygen and Carbon
• C. Hydrogen and Oxygen
• D. Carbon and Nitrogen

Answer: (A)

The Sun is dominated by hydrogen and helium. Most of the Sun’s mass comes from these two light elements, a legacy of the gas that formed the Sun from the early universe, which was overwhelmingly hydrogen and helium with only tiny amounts of heavier elements. In the Sun’s interior, hydrogen nuclei fuse into helium to power the star, but this fusion affects only a small portion of the total mass, so the overall composition stays mainly hydrogen and helium. The heavier elements—like oxygen, carbon, and nitrogen—are present, but in much smaller amounts. That’s why hydrogen and helium is the best description of what the Sun is primarily made of, while the other options describe elements that are present only in trace amounts.

The Sun is dominated by hydrogen and helium. Most of the Sun’s mass comes from these two light elements, a legacy of the gas that formed the Sun from the early universe, which was overwhelmingly hydrogen and helium with only tiny amounts of heavier elements. In the Sun’s interior, hydrogen nuclei fuse into helium to power the star, but this fusion affects only a small portion of the total mass, so the overall composition stays mainly hydrogen and helium. The heavier elements—like oxygen, carbon, and nitrogen—are present, but in much smaller amounts. That’s why hydrogen and helium is the best description of what the Sun is primarily made of, while the other options describe elements that are present only in trace amounts.