GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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by gravity
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while nuclear fission is occurring
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during a supernova explosion
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inside neutron stars
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Detailed explanation-1: -Supernovae are considered one of the original sources of the elements heavier than iron in the Universe. Even the iron in your blood can be traced back to supernovae or similar cosmic explosions from long before our Sun had formed. Supernovae are thus essential to life.
Detailed explanation-2: -As described above, a massive star becomes like an onion with the heaviest element, iron, fused in the center, and concentric shells of lighter elements out to helium and hydrogen.
Detailed explanation-3: -The only way to create substances heavier than iron is by a process called neutron capture, where neutrons penetrate an atomic nucleus-for example, an iron atom-which absorbs the neutrons, creating a new, heavier atomic nucleus and thus a new element.