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Why is it believed that lithium was present along Hydrogen and Helium already at first?
I was curious about why it's believed that lithium was present along Hydrogen and Helium right from the beginning.
That's an interesting question. According to the Big Bang theory, the universe started off as a hot, dense, and uniform mixture of hydrogen and helium gas. As the universe cooled down, the protons and neutrons started to combine to form atomic nuclei, and lithium was one of the first elements that formed in this process.