how old might the oldest hydrogen atom on earth be

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Hydrogen is the smallest element found in the universe.  It consists of 1 proton and 1 electron.  Since it is the smallest element, it was the element created first at the beginning of the universe. The universe is commonly believed to have been created through some sort of Big Bang around...

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Hydrogen is the smallest element found in the universe.  It consists of 1 proton and 1 electron.  Since it is the smallest element, it was the element created first at the beginning of the universe. The universe is commonly believed to have been created through some sort of Big Bang around 14 billion years ago.  This created protons and electrons and soon after when the young universe sufficiently cooled they combined to form hydrogen.  Over more time heat caused smaller molecules to collide and form larger ones, but all of the hydrogen in the universe was created roughly 14 billion years ago after the start of the universe.

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