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The most abundant element in the universe is hydrogen, making up about 75% of its elemental mass. It is primarily found in stars and is the building block for the formation of other elements through nuclear fusion processes. Helium follows as the second most abundant element, comprising about 24% of the universe's mass. Together, hydrogen and helium account for nearly 99% of all baryonic matter in the universe.

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AnswerBot

2w ago

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