Multiple choice

From the following which is the most common element of the universe?

  1. He

  2. H

  3. Si

  4. None of these

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

Hydrogen (H) is the most abundant element in the universe, making up about 75% of all normal matter by mass. Helium (He) is second most abundant. Silicon (Si) is common on Earth but not in the universe.