Why can't Iron be fused in the most heaviest stars?

We all know as soon a supergiant star starts to form iron it will not fuse that iron into any heavier element. Question is, why not? If you take the most heaviest stars, stars that are like 150-200 times the mass of our Sun (and consider Betelgeuse with only 15 solar mass will go Supernova), why won't such a... show more We all know as soon a supergiant star starts to form iron it will not fuse that iron into any heavier element. Question is, why not? If you take the most heaviest stars, stars that are like 150-200 times the mass of our Sun (and consider Betelgeuse with only 15 solar mass will go Supernova), why won't such a star fuse iron into a heavier element? Iron is only number 26 on the periodic table. Surely if the pressure and heat is strong enough denser elements could be formed, like Gold, Uranium etc. That stuff will form when a supernova occurs, so there is no mechanism that prevents the actual fusing of iron.
11 answers 11