wchich element is called as killer of star?
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carbon
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gold
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iron
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plutonium
Iron is called the 'killer of stars' because once a star's core begins fusing elements into iron, fusion stops releasing energy and instead consumes it. This causes the core to collapse, triggering a supernova in massive stars. Carbon, gold, and plutonium do not mark this critical stellar death threshold.
To answer this question, you need to understand the process of stellar evolution and the elements involved.
Option A) Carbon - This option is incorrect. Carbon is not known as the "killer of stars." Carbon is actually an element that is essential for the formation of stars and plays an important role in the fusion processes that occur within stars.
Option B) Gold - This option is incorrect. Gold is not known as the "killer of stars." Gold is a heavy element that can be formed through various stellar processes, but it does not have any specific properties that would make it a "killer" of stars.
Option C) Iron - This option is correct. Iron is often referred to as the "killer of stars." This is because when a massive star reaches the end of its life and exhausts its nuclear fuel, it undergoes a core collapse and supernova explosion. During this explosion, the core of the star collapses and becomes extremely dense. The pressure and temperature in the core become so high that iron nuclei begin to break apart, absorbing energy and causing the collapse to halt. This catastrophic event leads to the explosion of the star, dispersing its outer layers into space.
Option D) Plutonium - This option is incorrect. Plutonium is not known as the "killer of stars." Plutonium is a man-made element that is not naturally found in stars. It is primarily used in nuclear reactors and weapons.
Therefore, the correct answer is option C) iron. Iron is called the "killer of stars" because of its role in the core collapse and supernova explosions of massive stars.