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When the universe was 3 minutes old, it had cooled enough for these protons and neutrons to combine into nuclei. This is known as the time of nucleosynthesis. Hydrogen, helium, lithium, and beryllium were produced. Today, about 90% of the universe is still hydrogen. Your Welcome :)

The sources of elements in chemistry come from; The Big Bang, Cosmic Rays, Large Stars, Small Stars, Supernovae, and Man-Made labs.

What are the sources of Elements?

Elements are defined as any substance that cannot be decomposed into simpler substances by ordinary chemical processes.

Now, Elements are subdivided into several categories and they could come from The Big Bang, Cosmic Rays, Large Stars, Small Stars, Supernovae, and Man-Made labs.

For example, Hydrogen and helium are the two elements that come from the Big Bang. Then lithium, berylium, and boron all come from cosmic rays.

Read more about elements at; https://brainly.com/question/10892900

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