I was just reading up on white dwarfs for another thread and got thinking about what happens to the iron content of the original star. (2%)
Would I be correct in thinking that most of the processes involved in going through the red giant phase to forming a white dwarf, would tend to concentrate the iron into the core?
Then if you assume that the iron crushes down in a similar way, to the carbon & oxygen. does it make an even denser core at the centre of a star crushed down to the size of the earth?
Any guesses on what effect and iron core would have?