Multiple choice

Which element constitutes 74.9% of the mass of Sun?

  1. Hydrogen

  2. Helium

  3. Carbon

  4. Neon

  5. Oxygen
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A Correct answer
Explanation

74.9% of hydrogen constitutes the Sun.
 The sun is composed primarily of the chemical elements hydrogen and helium. They account for 74.9% and 23.8% of the mass of the Sun in the photosphere, respectively. All heavier elements, called metals in astronomy, account for less than 2% of the mass. The most abundant metals are oxygen (roughly 1% of the Sun's mass), carbon (0.3%), neon (0.2%), and iron (0.2%).

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