4 Number of elements present 3 minutes after the Big Bang. Because of the extreme temperature, hydrogen, helium, lithium, and beryllium existed only as bare atomic nuclei. About 300,000 years later, things had cooled enough to form atoms.
4 Number of elements present 3 minutes after the Big Bang. Because of the extreme temperature, hydrogen, helium, lithium, and beryllium existed only as bare atomic nuclei. About 300,000 years later, things had cooled enough to form atoms.
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