Since iron is a stars waste could a star that goes Super nova eject pure iron to travel across the galaxy?
Sure. Iron is not made in significant quantities in the Big Bang, so 100% of the iron on Earth today was synthesized in a star. There's no other source.
It escapes in many ways:
- Mergers between compact stars like white dwarfs and neutron stars
- Stellar winds from more ordinary stars
Supernovae are the main source of modern-day iron, with r-process nucleosynthesis during the explosion producing a lot of iron and elements near iron.