Iron.
See related question.
The material sent into space by a supernova is called supernova ejecta. It includes elements such as hydrogen, helium, carbon, oxygen, and heavier elements created during the supernova explosion.
During a supernova explosion, high-energy processes, such as fusion and neutron capture, occur, leading to the creation of elements heavier than iron, including carbon. These processes involve enormous amounts of energy and pressure, causing lighter elements to fuse into heavier ones. This is how carbon is produced in supernova explosions.
Because for a star to fuse elements heavy elements (iron and heavier) it would actually consume energy rather than liberate it. That doesn't work well to keep the star "alive." The explosion of the supernova itself can create these heavier elements because of the heat of the blast.
In cool stars, elements such as hydrogen and helium are primarily produced through nuclear fusion in their cores. Elements heavier than helium (e.g., carbon, oxygen, and iron) are formed through nucleosynthesis processes during the later stages of a star's lifecycle, such as in red giant stars or during supernova events.
Elements present in a star just before it forms a supernova would include hydrogen, helium, carbon, oxygen, and iron. The star undergoes nuclear fusion to produce heavier elements in its core, leading to the buildup of iron which triggers the supernova explosion.
Nuclear fusion stops and the star is no longer capable of transformming LIGHTER elements into HEAVIER. elements. At this point GRAVITY looses out and PRESSURE wins out thereby causing the supernova explosion. But bear in mind, there is a HUGE difference between an ordinary star going NOVA and a SUPERNOVA.
in the outer layers of supernova
Supernova form heavier elements
In a supernova event, elements such as hydrogen, helium, carbon, oxygen, and heavier elements like iron are produced through nuclear fusion and nucleosynthesis processes.
The material sent into space by a supernova is called supernova ejecta. It includes elements such as hydrogen, helium, carbon, oxygen, and heavier elements created during the supernova explosion.
All elements up to Iron are produced by smaller stars. heavier elements (everything heavier then iron) are produced from larger stars when they go supernova.
All elements up to Iron are produced by smaller stars. heavier elements (everything heavier then iron) are produced from larger stars when they go supernova.
They were formed in supernovae.
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 rapid collapse of the star compresses atoms together and may cause nuclear fusion and make heavier elements.
During a supernova explosion, high-energy processes, such as fusion and neutron capture, occur, leading to the creation of elements heavier than iron, including carbon. These processes involve enormous amounts of energy and pressure, causing lighter elements to fuse into heavier ones. This is how carbon is produced in supernova explosions.
As heavier elements are formed by fusion in the core, a massive star will eventually exhaust its nuclear fuel and trigger a supernova explosion. This explosion will generate immense energy, leading to the production and dispersal of even more heavy elements into space.