Question:

The most abundant element in the universe is

Show Hint

Hydrogen makes up about 75 percent of the mass of the universe.
Updated On: Oct 1, 2026
  • Hydrogen
  • Sodium
  • Magnesium
  • Potassium
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Concept:
Stars and interstellar gas are made mainly of the lightest element, formed first after the Big Bang.

Step 2: Detailed Explanation:
Hydrogen makes up about 75 percent of the universe by mass, and helium makes up most of the rest. All heavier elements together are only a small fraction.
Sodium, magnesium and potassium are present only in trace amounts on cosmic scales. They are more common on Earth, but not in the universe as a whole.

Step 3: Final Answer:
Hydrogen is the most abundant element, option (A).

Final Answer:
Hydrogen is the most abundant element. \[ \boxed{\text{(A) }\text{Hydrogen}} \]
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