Why can't massive stars generate energy through iron fusion?
A)because iron fusion requires very high density
B)because no star can get hot enough for iron fusion
C)because both fusion and fission of iron nuclei absorb energy
D)because massive stars go supernova before they create an iron core

Question

Quizplus · Accepted Answer

Both fusion and fission of iron nuclei absorb energy, rather than releasing energy like fusion reactions in smaller stars. This means that iron fusion cannot generate energy and instead removes energy from the star's core, leading to its collapse and eventual supernova explosion.

Why Can't Massive Stars Generate Energy Through Iron Fusion