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Periodic classification of element

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  1. Which of the following is the most common element in the universe?
    1. Hydrogen
    2. Oxygen
    3. Nitrogen
    4. Carbon
Correct Option: A

The most abundant element in the universe is hydrogen, which makes up about 3/4 of all matter! Helium makes up most of the remaining 25%. Oxygen is the third most abundant element in the universe. All of the other elements are relatively rare.


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