Multiple choice general knowledge science & technology

Most abundant element in universe is

  1. Iron

  2. Carbon

  3. Oxygen

  4. Hydrogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen is the most abundant element in the universe, comprising about 75% of all normal matter by mass. It was formed during the Big Bang nucleosynthesis and remains the primary fuel for stars through nuclear fusion. Iron, carbon, and oxygen are much less abundant on a cosmic scale.

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