Approximately how long after the big bang did the era of nucleosynthesis end, marking the time when the basic chemical composition of the universe was determined?

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08-12-2022
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Approximately how long after the big bang did the era of nucleosynthesis end, marking the time when the basic chemical composition of the universe was determined?

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syadzayasmine syadzayasmine · Answer 1 · 2022-12-15T08:44:27+01:00

Approximately The Era of nucleosynthesis lasted until 3 minutes after the Big Bang marking the time when the basic chemical composition of the universe. This predicted by Big Bang theory.

The process of creating new atomic nuclei—the protons and neutrons that make up the centers of atoms—is known as nucleosynthesis. Within a few minutes after the Big Bang, the process of nucleosynthesis began. Protons and neutrons were created at that moment from a quark-gluon plasma, a mixture of quarks and gluons.

The Big Bang Nucleosynthesis theory predicts that about 25% of the universe's mass will be made up of helium. Approximately 0.01% deuterium and even lower amounts of lithium are also predicted. The density of baryons at the moment of nucleosynthesis has a significant impact on the prediction. The required density of baryons is a few percent in terms of the critical density of matter that exists now.

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