Multiple choice

Which of the following gases is most predominant in the sun?

  1. Hydrogen

  2. Helium

  3. Nitrogen

  4. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydrogen is the most abundant gas in the Sun, making up about 73% of its mass. Helium (B) is second at ~25%, while other gases like nitrogen (C) exist only in trace amounts. The Sun's energy comes from hydrogen fusion.