How were heavy elements formed and how did they get to Earth?

Answer 1

Elements heavier than Iron is made in supernova explosions of stars.

The universe contained only hydrogen and helium at the time of the big bang. Elements heavier than iron were created in supernovas, as our solar system and sun are third-generation stars and their planets. As a result, heavy elements came to Earth from a previous supernova that occurred before the earth formed.

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Answer 2

Ian Aitchison

Some heavy elements on Earth originated from these processes, deposited through stellar winds or supernova remnants. Heavy elements are created through nuclear fusion in the cores of massive stars during their lifecycle. These elements can be released into space through supernova explosions, enriching the interstellar medium.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.