How are elements that are heavier than hydrogen spread throughout the universe?
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No other element is heavier than hydrogen
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Elements that are heavier than hydrogen are spread throughout the universe only during a supernova explosion. It is an explosion of the stars when the star reaches its death stage. When the star is alive, the gravity of its core squeezes lighter atoms like hydrogen to make heavier atoms like carbon and helium.
When a supernova explosion takes place, these heavier elements are expelled forcefully into the universe at the speed of around 25,000 miles per second.
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