GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hydrogen and helium are elements on the Periodic Table
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Hydrogen and helium are in the same ratio throughout the universe.
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Hydrogen and helium have many current uses today
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None of the above
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Detailed explanation-1: -Basically, the hydrogen-helium abundance helps us to model the expansion rate of the early universe. If it had been faster, there would be more neutrons and more helium. If it had been slower, more of the free neutrons would have decayed before the deuterium stability point and there would be less helium.
Detailed explanation-2: -Big Bang nucleosynthesis predicts a primordial abundance of about 25% helium-4 by mass, irrespective of the initial conditions of the universe.
Detailed explanation-3: -One of the predictions that the Big Bang theory leads to, concerns the abundance by mass of Helium we should see in the universe. The “conditions” during Big Bang Nucleosynthesis were just perfect to create about 25% Helium, 75% Hydrogen, and much less than 1% of everything else.