Question

What does supernova produce, helium or carbon?

Answer 1

Multiple Post. Please refer to your later post, which I saw first.

Sra

Answer 2

IT produced neutrons in a neutron star, or a black hole.

Answer 3

Supernovas produce and eject carbon and heavier elements, in a violent explosion. The remainder becomes a neutron star as protons and electrons are crushed together to form neutrons.

Normal "main sequence" stars produce mostly helium. When the hydrogen is gone at the stellar interior, helium is converted to atoms as heavy as oxygen, including carbon.