After a star has converted most of its Hydrogen into Helium, it can no longergenerate the energy to maintain its size against its own gravity and begins to contract. This contraction heats of the interior and if the heat is great enough (because the star is massive enough) it can begin a new fusion process, turning Helium into Carbon. However, this process is nowhere as efficient as the Hydrogen-Helium one and a star in this stage will only last a small fraction of the time it spent as a H-He factory.
Soon (cosmically speaking), the Helium will be exhausted and a new contraction will begin, which MAY, if the mass is enough, start a new fusion process with the Carbon to produce Oxygen, Neon, Silicon. Each stage is less efficient than the one before and when the star starts making Iron, its on its last cycle. Turning Iron into other elements CONSUMES energy rather than releases it.
In exceptional cases, the mass of the star may be great enough that the Iron is put to what is rather inelegantly called "Maximum Scrunch," and it rebounds with a burst of neutrinos followed by a stellar explosion we call a Supernova. Supernovae are responsible for making all the elements more complex than Iron.
Hydrogen, helium, carbon dioxide, and calcium.
the star collapses in on itself, and usually when the fusion stops it is in the last stages of its life as a giant or supergiant and forms a white dwarf made of the carbon left over from the second stage of helium to carbon fusion from the core of the star that takes place after the hydrogen to helium fusion. after the white dwarf is formed it will eventually cool off into a black dwarf which is basically a carbon corpse of a star
Brown dwarf
Brown Dwarf
Into heavier elements like carbon and oxygen.
Sun
A low-mass star never gets hot enough in the core to fuse helium into carbon.
Temperatures in the star's core can reach 3x109 K.
carbon dioxide
Mostly carbon
Hydrogen, helium, carbon dioxide, and calcium.
Texas. Lone Star State has largest carbon footprint. When it comes to putting carbon into the air, Texas is the nation's biggest polluter.
Hydrogen, helium, carbon dioxide, and calcium.
On Earth carbon is not synthesized, we have what we have.In the Sun carbon is not synthesized.In red giant stars carbon is synthesized by nuclear fusion of 3 helium nuclei to produce 1 carbou nucleus. However this carbon will remain inside the star.
Actually fusing carbon, such as in a star will create one of several type of elements. In the vast majority of stars carbon is not fused at all, but depending on the star's mass carbon may fuse into neon, oxygen, magnesium, among a couple others. This happens in specific type of stars, at specific times in their lives. Fusing is different from chemical reactions. There are no chemical reactions that can make elements, but with nuclear transmutation you can do it. For example, in a star hydrogen is fused into helium, and sometimes helium into carbon.
helium atoms fuse to form carbon atoms in the core of the star
the star collapses in on itself, and usually when the fusion stops it is in the last stages of its life as a giant or supergiant and forms a white dwarf made of the carbon left over from the second stage of helium to carbon fusion from the core of the star that takes place after the hydrogen to helium fusion. after the white dwarf is formed it will eventually cool off into a black dwarf which is basically a carbon corpse of a star