Which is the lightest and the most abundant element in the universe?

Hydrogen

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Nitrogen

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Oxygen

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Helium

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Solution

The correct option is A
Hydrogen

Hydrogen has an atomic weight of 1.00794u and it accounts for 75% of the matter in the universe thus making it as the lightest and most abundant element in the universe.

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Similar questions

In human body which element is most abundant by weight and by number respectively?

a) carbon, hydrogen

b) oxygen, hydrogen

c) oxygen, carbon

d) carbon, nitrogen

Helium is the second most abundant element in the Universe. Yet, it is not the most abundant on Earth - Why?

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