Question

How were the heavy elements from iron to uranium made?

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Answer 1

Answer: During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as uranium and gold, to be produced.

Explanation: In the supernova explosion, all of these elements are expelled out into space. ... The explosion of the star distributes the heavier elements into space.

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Answer 2

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Heavier elements formed later inside stars, where nuclear reactions jammed protons and neutrons together to make new atomic nuclei. For instance, four hydrogen nuclei fuse through a series of reactions into a helium nucleus . That's what happens in our sun, and it produces the energy that warms Earth. But when fusion creates elements that are heavier than iron, it requires an excess of neutrons. Therefore, astronomers assume that heavier atoms are minted in supernova explosions, where there is a ready supply of neutrons, although the specifics of how this happens are unknown.

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