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.
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Iron is the element that forms last in nuclear fusion in stars. This is because the fusion of lighter elements into heavier elements releases energy up to iron, but fusion of iron nuclei consumes energy.
Hydrogen is the most abundant element in the universe and is the primary element that is burned in stars, particularly in the process of nuclear fusion to form helium.
Hydrogen fusion occurs in stars to create helium. This process, known as nuclear fusion, involves the fusion of hydrogen nuclei to form helium nuclei, releasing large amounts of energy in the process.
Stars are driven by Nuclear Fusion.
When elements are combined to produce another element, this process is called nuclear fusion. Nuclear fusion is the process in which two lighter atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This is the process that powers the sun and other stars.
Planets do not naturally generate nuclear fusion. Nuclear fusion occurs in stars, where the extreme heat and pressure at the core allows hydrogen nuclei to merge and form helium, releasing energy in the process. Planets lack the conditions necessary for sustained nuclear fusion reactions.