Formation of neutron stars and black holes.

[LogicalAcid]

First of all, I know that that very large stars tend to form black holes, and smaller stars, but still massive in comparison to our sun, tend to form neutron stars. My question is, if matter is lost when a star collapses into a black hole, but can still form one, why is it that it is a star first if it has more mass than the original black hole?

 

[jobigoud]

why is it that it is a star first if it has more mass than the original black hole?

During its normal life, the nuclear reactions in the star's core creates outward pressure that compensate the gravity. It is only when the star has radiated most of its energy from nuclear reactions that it has trouble fighting gravity. Depending on its mass at this point, it may collapse to a white dwarf, a neutron star, or a black hole.

 

[StevieBarratt]

I understand that a neutron star is a star so effected by gravity that the electron shells have been foced into the protons to form neutrons. Presumably these neutrons are packed in tightly together as they have no repulsive charges and are under enormous gravitational pressure. Also, most of an atom is empty space between the nucleus and the electon quanta. If there are no electrons, does that mean that we have effectively a supermassive atomic nucleus? Or is that black hole territory? Or (most likely) I'm missing something!

 

[Kracatoan]

https://www.physicsforums.com/showthread.php?t=461582

covers some of the stuff you are talking about.