deuterium, and tritium
Hydrogen is turned into helium in stars.
Existing element is product of nuclear fusion, heavy element exist from over fusion and thus create high atomic mass substance. To answer what is the element that is form last in nuclear fusion in star is the same as asking what is the heaviest element occur or found in nature. Base on what is in periodic table. The heaviest element found naturally is around Uranium - Plutonium thus it could be considered the last product known in nuclear fusion in star. There are heavier element than Uranium and Plutonium but those are synthesize element. Nuclear fusion might go to element heavier than what is known in our periodic table but those substance may be unstable and decay over time until none of those exist.
You think probable to hydrogen.
Nuclear fusion or nuclear fission.
A massive star with iron in its core will stop nuclear fusion, leading to its collapse and eventual explosion as a supernova. Iron is the element at which fusion becomes endothermic, meaning energy is no longer released in the process.
They are related because it is the element most often used in fusion in both the natural and synthesised fusions of the universe. Look up fusion in the sun for more information
A nuclear energy plant produces electricity by either nuclear fusion or fission. Fusion is the combining of two atoms of the same element (such as hydrogen) to produce a new element (helium). Fission is the process of breaking down a large unstable atom of one element into two different elements. Both fusion and fission produce enormous amounts of energy and heat. The heat produced is used to heat water into steam which is then used to rotate the blades of a turbine which produces electricity.
Helium is produced by fusion in the interior of the Sun.
Mainly; hydrogen, deuterium, and tritium
Iron is the most massive element that can be formed by nuclear fusion with the liberation of energy. This is because fusion reactions beyond iron require an input of energy rather than liberating energy.
nuclear fusion
Nuclear fusion is not used for any purpose at present, it is still in the experimental phase