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Iron cannot release energy by fusion. When a star has used up all the lighter

elements and has just iron left, it has no more nuclear "fuel".

That causes the star to contract then explode very violently as a supernova.

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Q: Why is iron significant to understanding how a supernova occurs?
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What is the relationship between the periodic table and a supernova?

The elements on the periodic table were created by stars through nuclear fusion. We use the term stellar nucleosynthesis to describe what stars are doing through fusion. Stars fuse hydrogen into helium, and then start making heavier elements by a different fusion process. But stars can only make elements up through iron. They can't make the heavier elements. Enter the supernova. A supernova is that "big blast" that occurs at the end of the life of some stars. In a supernova, the trans-iron elements are formed. That is, all the elements heavier than iron are formed in a supernova. Because the elements heavier than iron are formed in a supernova, we can say that there is a relationship between the supernova and the periodic table of elements.


The onset of iron fusion causes a star to become a?

A supernova


Where do heavy elements such an iron come from?

From the outer layers emitted by a supernova.outer layer of a supernova.


What is the heaviest element that a star can produce through fusion before going supernova?

The heaviest element that can be produced prior to supernova is Iron (Fe).


Does a supernova fuse heavy elements into iron?

Yes. See related question.


Which elements would be present in a star just before it forms a supernova?

Iron


What is in a supernova?

there is Hydrogen, Iron, Helium, Uranium and most of the elements. up to the 26th element


What stellar event produced elements with atomic masses greater than iron?

supernova


What is the last element a red super giant produces before a supernova explosion?

It is iron.


How are elements with nuclei larger than iron nuclei formed?

Supernova form heavier elements


What elements are formed during a nova or supernova?

It is the elements heavier than iron that are formed in a supernova. All the heavier elements up through uranium appear when a star of sufficient mass collapses in a supernova event. These heavier elements, sometimes referred to as the trans-iron elements, appear in the collapse of a massive star. In this catastrophic event, the iron and silicon (and any other lighter elements) in the star are super compressed. The already hot conditions are made even hotter, and the available energy is sufficient to drive the fusion reactions that create the trans-iron elements.All the fusion reactions up through those that create iron are exothermic, and that means they release energy. The fusion reactions that create the trans-iron elements are endothermic, and that means energy has to be put into them. Only in the collapse of a star of sufficient mass is there enough energy to drive the fusion reactions that produce the trans-iron elements.See periodic table (iron is number 26).See related link.


What is a iron meteorite?

A meteorite that contains a significant amount of iron.