Question

1 - nm - physics - s2
when a high - mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse
when nuclear fusion ends in a high - mass star, the heavy elements formed in the star’s core are released through a

Explanation:

In high - mass stars, after hydrogen and helium in the core are exhausted, carbon fusion begins. When nuclear fusion ends in a high - mass star, a supernova explosion occurs which releases heavy elements formed in the core.

Answer:

1. Carbon
2. Supernova explosion