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The second most abundant element found in the universe is:

The second most abundant element found in the universe is: Correct Answer Helium

Explanation:

  • Hydrogen: It is denoted by the symbol H and found in the form of its isotope protium (1H1), deuterium(1H2), tritium (1H3). 
    • ​It is Created during the hot Big Bang but depleted by stellar fusion, ~70% of the Universe remains hydrogen.
  • Helium: It is denoted by He (2He4). It is formed by the fusion reaction of hydrogen in stars.
    •  About 28% is helium, with 25% formed in the Big Bang and 3% from stellar fusion.
  • Oxygen: It is denoted by O (8O16).
    • The most common (~1%) heavy element, oxygen arises from fusion in massive, pre-supernova stars.
  • Carbon: It is denoted by C (6C12).
    • The first heavy element created by stars, carbon mostly originates within red giants.

So, Helium is the second most abundant element found in the universe.

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The most abundant element in the universe is:
Which is the most abundant element in the universe?