GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TRUE
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FALSE
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Either A or B
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None of the above
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Detailed explanation-1: -Hydrogen and helium are estimated to make up roughly 74% and 24% of all baryonic matter in the universe respectively. Despite comprising only a very small fraction of the universe, the remaining “heavy elements” can greatly influence astronomical phenomena.
Detailed explanation-2: -Hydrogen and helium account for nearly all the nuclear matter in today’s universe. This is consistent with the standard or “big bang” model. The process of forming the hydrogen and helium and other trace constituents is often called “big bang nucleosynthesis".
Detailed explanation-3: -Today hydrogen is estimated to account for 90% of all atoms in the universe, and it is essential to the material world.
Detailed explanation-4: -At that time, the Universe was made out of about 92% hydrogen atoms and 8% helium atoms by number (or about 75-76% hydrogen and 24-25% helium by mass), with trace amounts of lithium and beryllium, but not much else.