GENERAL KNOWLEDGE

Detailed explanation-1: -They’ve found that the universe contains about 74 percent hydrogen and 26 percent helium by mass, the two lightest elements. All the other heavier elements–including elements common on earth, such as carbon and oxygen–make up just a tiny trace of all matter.

Detailed explanation-2: -Updated evaluations say that 73% of all the material in the Universe are hydrogen atoms and an additional 25% are helium atoms. Everything else makes up a meagre 2% of the remaining material in the universe.

Detailed explanation-3: -The data indicates that hydrogen and helium make up nearly all of the nuclear matter in the universe. The most abundant element, hydrogen, accounts for 74% of the mass while helium contributes 25%. Heavier elements comprise less than 1% of the total.

Detailed explanation-4: -Hydrogen makes up about 70% of the universe by mass, which makes it by far the most abundant element. In stars like the sun, hydrogen atoms collide to create Helium atoms, which is a fusion reaction.