The star "burns out" because iron cannot be fused. What happens then depends on the star's remaining mass:
iron
Before a supernova occurs, a massive star undergoes fusion to produce iron in its core. As fusion progresses, the star creates heavier elements up to iron, which cannot release energy through fusion. When the core becomes predominantly iron, it can no longer support the star against gravitational collapse, leading to a supernova explosion.
The onset of iron fusion causes a star to become a supernova. This process occurs when the star's core collapses due to the inability to support the fusion of iron, leading to a catastrophic explosion.
Fusion in high-mass stars ends when they fuse silicon into iron. This process occurs in the star's core as it reaches the end of its life cycle. Iron is the final product of fusion because it has the lowest binding energy per nucleon, meaning that fusing iron does not release energy. Consequently, when the core becomes predominantly iron, the star can no longer sustain nuclear fusion, leading to its collapse and potentially resulting in a supernova.
The inner core is made of iron and nickel. Since it's so hot down there fusion occurs causing the earth's core to be solid. The outer core is also made of iron and nickel. But, since the temperature isn't as high, the iron and nickel is liquid.
The final core element for a massive star is iron. When a massive star exhausts its nuclear fuel, iron builds up in its core due to fusion reactions. Iron cannot undergo further fusion to release energy, leading to a collapse and subsequent supernova explosion.
Iron. Iron is the heaviest element that can be produced through nuclear fusion in a star, and once the core of a massive star is mostly composed of iron, it can no longer sustain fusion reactions. This triggers its collapse and ultimately leads to a supernova explosion.
No. The SUN's core is Hydrogen and Helium. The EARTH's core is Iron and Nickel.
The process is called stellar nucleosynthesis and is based on nuclear fusion reactions.
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.
Massive stars cannot generate energy from iron fusion because iron fusion does not release energy, rather it absorbs energy. Iron is the most stable element, and fusion of iron requires more energy than it produces, making it an unfavorable process for generating energy in stars. This leads to the collapse of the star's core and triggers a supernova explosion.
Electromagnetism